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Introduction: Pulmonary diseases represent a significant burden to patients and the healthcare system and are one of the leading causes of mortality worldwide. Particularly, the COVID-19 pandemic has had a profound global impact, affecting public health, economies, and daily life. While the peak of the crisis has subsided, the global number of reported COVID-19 cases remains significantly high, according to medical agencies around the world. Furthermore, despite the success of vaccines in reducing the number of deaths caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), there remains a gap in the treatment of the disease, especially in addressing uncontrolled inflammation. The massive recruitment of leukocytes to lung tissue and alveoli is a hallmark factor in COVID-19, being essential for effectively responding to the pulmonary insult but also linked to inflammation and lung damage. In this context, mice models are a crucial tool, offering valuable insights into both the pathogenesis of the disease and potential therapeutic approaches. Methods: Here, we investigated the anti-inflammatory effect of the glycosaminoglycan (GAG)-binding chemokine fragment CXCL9(74-103), a molecule that potentially decreases neutrophil transmigration by competing with chemokines for GAG-binding sites, in two models of pneumonia caused by coronavirus infection. Results: In a murine model of betacoronavirus MHV-3 infection, the treatment with CXCL9(74-103) decreased the accumulation of total leukocytes, mainly neutrophils, to the alveolar space and improved several parameters of lung dysfunction 3 days after infection. Additionally, this treatment also reduced the lung damage. In the SARS-CoV-2 model in K18-hACE2-mice, CXCL9(74-103) significantly improved the clinical manifestations of the disease, reducing pulmonary damage and decreasing viral titers in the lungs. Discussion: These findings indicate that CXCL9(74-103) resulted in highly favorable outcomes in controlling pneumonia caused by coronavirus, as it effectively diminishes the clinical consequences of the infections and reduces both local and systemic inflammation.

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Bovine coronavirus (BCoV) has dual tropisms that can trigger enteric and respiratory diseases in cattle. Despite its global distribution, BCoV field strains from Brazil remain underexplored in studies investigating the virus's worldwide circulation. Another research gap involves the comparative analysis of S protein sequences in BCoV isolates from passages in cell lines versus direct sequencing from clinical samples. Therefore, one of the objectives of our study was to conduct a comprehensive phylogenetic analysis of BCoV strains identified from Brazil, including a respiratory strain obtained during this study, comparing them with global and ancestral BCoV strains. Additionally, we performed a comparative analysis between wild-type BCoV directly sequenced from the clinical sample (nasal secretion) and the cell culture-adapted strain, utilizing the Sanger method. The field strain and multiple cell passage in cell culture (HRT-18) adapted BCoV strain (BOV19 NS) detected in this study were characterized through molecular and phylogenetic analyses based on partial fragments of 1,448 nt covering the hypervariable region of the S gene. The analyses have demonstrated that different BCoV strains circulating in Brazil, and possibly Brazilian variants, constitute a new genotype (putative G15 genotype). Compared with the ancestral prototype (Mebus strain) of BCoV, 33 nt substitutions were identified of which 15 resulted in non-synonymous mutations (nine transitions and six transversions). Now, compared with the wild-type strain was identified only one nt substitution in nt 2,428 from the seventh passage onwards, which resulted in transversion, neutral-neutral charge, and one substitution of asparagine for tyrosine at aa residue 810 (N810Y).

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We report a human coronavirus OC43 infection outbreak in hospitalized patients and healthcare workers in São Paulo, Brazil, occurring after SARS-CoV-2 cases disappeared. Infection was associated with healthcare workers in 5 (29.4%) patients. Routine surveillance including a respiratory virus panel can improve coronavirus detection in both healthcare professionals and patients.

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INTRODUCTION: After the implementation of mitigation strategies during the COVID-19 pandemic, the incidence of respiratory viruses, including human coronaviruses (HCoV), experienced a significant decrease. The aim of this study is to characterize the epidemiology and clinical aspects of HCoV infections in ambulatory adults during COVID-19 pandemic times. METHODS: descriptive, prospective, longitudinal study performed in a private hospital in La Plata, Buenos Aires, Argentina between November 2020 and October 2022; 458 outpatient adults with upper respiratory tract infections (URTI) were studied undergoing clinical and microbiological follow-up. RESULTS: 44 (9.6%) subjects were positive by multiplex PCR for HCoV. 14 of them for 229E (31.8%), 13 for OC43 (29.5%), 11 for HKU-1 (25.1%) and 6 for NL63 (13.6%). A repeated PCR was positive for the same HCoV in 19 (57%) of 33 patients on day 3-5. No hospitalizations or deaths were reported. DISCUSSION: Endemic HCoV caused a significant proportion of URTI among outpatient adults during COVID-19-related restrictions times. An alternating pattern of circulation between alfa-HCoV and beta-HCoV was observed.

Introducción: Tras la implementación de estrategias de mitigación durante la pandemia de COVID-19, la incidencia de virus respiratorios, incluyendo los coronavirus humanos (HCoV), disminuyó significativamente. El objetivo de este estudio es caracterizar la epidemiología y los aspectos clínicos de las infecciones por HCoV en adultos ambulatorios durante la pandemia de COVID-19. Métodos: estudio descriptivo, prospectivo, longitudinal, realizado en un hospital privado de La Plata, Buenos Aires, Argentina, entre noviembre de 2020 y octubre de 2022. Se estudiaron 458 pacientes adultos ambulatorios con infecciones del tracto respiratorio superior (ITRS) bajo seguimiento clínico y microbiológico. Resultados: 44 (9.6%) sujetos fueron positivos por PCR multiplex para HCoV. Se detectaron 14 229E (31.8%), 13 OC43 (29.5%), 11 HKU-1 (25.1%) y 6 NL63 (13.6%). Una segunda PCR fue positiva para el mismo HCoV en 19 (57 %) de 33 pacientes en los días 3-5. No se reportaron hospitalizaciones ni muertes. Discusión: los HCoV endémicos causaron una proporción significativa de ITRS entre pacientes adultos ambulatorios durante los tiempos de restricciones relacionados con COVID-19. Se observó un patrón alternante de circulación entre alfa-HCoV y beta-HCoV.

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Objetivo: analisar a prevalência da COVID-19 entre os fisioterapeutas brasileiros e os fatores associados segundo características demográficas e ocupacionais. Método: estudo transversal, analítico, segundo inquérito on-line, com a participação de 670 fisioterapeutas de todas as regiões do Brasil. Utilizou-se uma adaptação do método respondent driven sampling ao ambiente virtual para a coleta de dados. Análises bivariadas e de regressão logística múltipla foram utilizadas para identificar associação entre o diagnóstico da COVID-19 e variáveis demográficas e ocupacionais. Considerou-se variáveis estatisticamente significativas com base em um p<0,05. Resultados: a prevalência da COVID-19 foi de 30% (IC95%: 27,8-32,3). Fisioterapeutas da região Sudeste tiveram menores chances de ter diagnóstico da COVID-19. Fisioterapeutas que prestaram assistência em hospital de campanha, que ficaram isolados da família e que tem crianças menores de 12 em casa tiveram chances aumentadas para o diagnóstico da infecção. Conclusão: questões sociodemográficas e ocupacionais impactam no aumento do diagnóstico de Covid-19 entre profissionais fisioterapeutas, o que enfatiza a necessidade de um sistema de saúde de qualidade, igualitário nas diferentes regiões brasileiras.(AU)

Objective: to estimate the prevalence of COVID-19 among Brazilian physiotherapists and its associated factors. Method: cross-sectional study, according to an online survey, with the participation of 670 physiotherapists from all regions of Brazil. An adaptation of the respondent driven sampling method to the virtual environment was used to collect data. Bivariate and multiple logistic regression analyzes were used to identify associations between the diagnosis of COVID-19 and demographic and occupational variables. Variables were considered statistically significant based on p<0.05. Results: the prevalence of COVID-19 was 30% (95%CI: 27.8-32.3). In the Southeast region, physiotherapists were less likely to be diagnosed with COVID-19. Physiotherapists who provided care in a field hospital, who were isolated from their families and who have children under 12 years of age at home had an increased chance of being diagnosed with the infection.Conclusion: sociodemographic and occupational issues impact the increase in COVID-19 diagnoses among physiotherapists, which emphasizes the need for a quality and egalitarian health system in different Brazilian regions.(AU)

Objetivo: evaluar la tasa de prevalencia del COVID-19 en fisioterapeutas de Brasil y analizar sus factores asociados. Método: realizamos un estudio transversal mediante una encuesta on-line, en la que participaron 670 fisioterapeutas de todas las áreas de Brasil. Para la recogida de datos se utilizó una adaptación del método respondent driven sampling al entorno virtual. Se utilizaron análisis bivariados y de regresión logística múltiple para identificar la asociación entre el diagnóstico COVID-19 y variables demográficas y ocupacionales. Las variables se consideraron estadísticamente significativas en función de una p<0,05. Resultados: la prevalencia de COVID-19 fue del 30% (IC 95%: 27,8-32,3). Los fisioterapeutas del sudeste tenían menos probabilidades de ser diagnosticados de COVID-19. Los fisioterapeutas que prestaban asistencia en un hospital de campaña, que estaban aislados de sus familias y que tenían hijos menores de 12 años en casa tenían más probabilidades de que se les diagnosticara la infección. Conclusiones: aspectos sociodemográficos y ocupacionales inciden en el aumento del diagnóstico de COVID-19 entre los fisioterapeutas profesionales, lo que enfatiza la necesidad de un sistema de salud de calidad e igualitario en las diferentes regiones brasileñas.(AU)

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Abstract Introduction : After the implementation of mitigation strategies during the COVID-19 pandemic, the incidence of respiratory viruses, including human coronaviruses (HCoV), experienced a significant decrease. The aim of this study is to characterize the epidemiology and clinical aspects of HCoV infections in ambulatory adults during COVID-19 pandemic times. Methods : descriptive, prospective, longitudinal study performed in a private hospital in La Plata, Buenos Aires, Argentina between November 2020 and October 2022; 458 outpatient adults with upper respiratory tract infections (URTI) were studied undergoing clinical and microbiological follow-up. Results : 44 (9.6%) subjects were positive by multiplex PCR for HCoV. 14 of them for 229E (31.8%), 13 for OC43 (29.5%), 11 for HKU-1 (25.1%) and 6 for NL63 (13.6%). A repeated PCR was positive for the same HCoV in 19 (57%) of 33 patients on day 3-5. No hospitalizations or deaths were reported. Discussion : Endemic HCoV caused a significant pro portion of URTI among outpatient adults during COVID- 19-related restrictions times. An alternating pattern of circulation between alfa-HCoV and beta-HCoV was observed.

Resumen Introducción : Tras la implementación de estrate gias de mitigación durante la pandemia de COVID-19, la incidencia de virus respiratorios, incluyendo los coronavirus humanos (HCoV), disminuyó significati vamente. El objetivo de este estudio es caracterizar la epidemiología y los aspectos clínicos de las infecciones por HCoV en adultos ambulatorios durante la pandemia de COVID-19. Métodos : estudio descriptivo, prospectivo, longitudi nal, realizado en un hospital privado de La Plata, Buenos Aires, Argentina, entre noviembre de 2020 y octubre de 2022. Se estudiaron 458 pacientes adultos ambulatorios con infecciones del tracto respiratorio superior (ITRS) bajo seguimiento clínico y microbiológico. Resultados : 44 (9.6%) sujetos fueron positivos por PCR multiplex para HCoV. Se detectaron 14 229E (31.8%), 13 OC43 (29.5%), 11 HKU-1 (25.1%) y 6 NL63 (13.6%). Una segunda PCR fue positiva para el mismo HCoV en 19 (57 %) de 33 pacientes en los días 3-5. No se reportaron hospitalizaciones ni muertes. Discusión : los HCoV endémicos causaron una pro porción significativa de ITRS entre pacientes adultos ambulatorios durante los tiempos de restricciones rela cionados con COVID-19. Se observó un patrón alternante de circulación entre alfa-HCoV y beta-HCoV.

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The COVID-19 pandemic caused by the SARS-CoV-2 (ß-CoV) betacoronavirus has posed a significant threat to global health. Despite the availability of vaccines, the virus continues to spread, and there is a need for alternative strategies to alleviate its impact. Vitamin D, a secosteroid hormone best known for its role in bone health, exhibits immunomodulatory effects in certain viral infections. Here, we have shown that bioactive vitamin D (calcitriol) limits in vitro replication of SARS-CoV-2 and murine coronaviruses MHV-3 and MHV-A59. Comparative studies involving wild-type mice intranasally infected with MHV-3, a model for studying ß-CoV respiratory infections, confirmed the protective effect of vitamin D in vivo. Accordingly, mice fed a standard diet rapidly succumbed to MHV-3 infection, whereas those on a vitamin D-rich diet (10,000 IU of Vitamin D3/kg) displayed increased resistance to acute respiratory damage and systemic complications. Consistent with these findings, the vitamin D-supplemented group exhibited lower viral titers in their lungs and reduced levels of TNF, IL-6, IL-1ß, and IFN-γ, alongside an enhanced type I interferon response. Altogether, our findings suggest vitamin D supplementation ameliorates ß-CoV-triggered respiratory illness and systemic complications in mice, likely via modulation of the host's immune response to the virus.

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Whether RNA-RNA interactions of cytoplasmic RNA viruses, such as Betacoronavirus, might end in the biogenesis of putative virus-derived small RNAs as miRNA-like molecules has been controversial. Even more, whether RNA-RNA interactions of wild animal viruses may act as virus-derived small RNAs is unknown. Here, we address these issues in four ways. First, we use conserved RNA structures undergoing negative selection in the genomes of SARS-CoV, MERS-CoV, and SARS-CoV-2 circulating in different bat species, intermediate animals, and human hosts. Second, a systematic literature review was conducted to identify Betacoronavirus-targeting hsa-miRNAs involved in lung cell infection. Third, we employed sophisticated long-range RNA-RNA interactions to refine the seed sequence homology of hsa-miRNAs with conserved RNA structures. Fourth, we used high-throughput RNA sequencing of a Betacoronavirus-infected epithelial lung cancer cell line (Calu-3) to validate the results. We proposed nine potential virus-derived small RNAs: two vsRNAs in SARS-CoV (Bats: SB-vsRNA-ORF1a-3p; SB-vsRNA-S-5p), one vsRNA in MERS-CoV (Bats: MB-vsRNA-ORF1b-3p), and six vsRNAs in SARS-CoV-2 (Bats: S2B-vsRNA-ORF1a-5p; intermediate animals: S2I-vsRNA-ORF1a-5p; and humans: S2H-vsRNA-ORF1a-5p, S2H-vsRNA-ORF1a-3p, S2H-vsRNA-ORF1b-3p, S2H-vsRNA-ORF3a-3p), mainly encoded by nonstructural protein 3. Notably, Betacoronavirus-derived small RNAs targeted 74 differentially expressed genes in infected human cells, of which 55 upregulate the molecular mechanisms underlying acute respiratory distress syndrome (ARDS), and the 19 downregulated genes might be implicated in neurotrophin signaling impairment. These results reveal a novel small RNA-based regulatory mechanism involved in neuropathogenesis that must be further studied to validate its therapeutic use.

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Introducción: Actualmente los contagios por el virus del SARS-CoV-2 supera los 600 millones de casos en el mundo. Objetivo: Aislar y caracterizar el virus SARS-CoV-2 causante de la COVID-19 a inicios de la pandemia en el Perú. Materiales y métodos: Se realizó el aislamiento viral a partir de 20 muestras de hisopado nasal y faríngeo positivas a SARS-CoV-2 por RT-PCR. El aislamiento se realizó en las líneas celulares Vero ATCC CCL-81 y Vero E6, evaluando el efecto citopático, la presencia del virus por RT-PCR, inmunofluorescencia indirecta (IFI) y posterior identificación por secuenciación genómica. Posteriormente, uno de los aislamientos de mayor circulación fue seleccionado y denominado cepa prototipo (PE/B.1.1/28549/2020), realizándose 10 pasajes sucesivos en células Vero ATCC CCL-81 para evaluar la dinámica de mutaciones. Resultados: Se observaron 11 aislamientos de virus por efecto citopático confirmándose por RT-PCR e IFI, de los cuales 6 fueron secuenciados identificándose los linajes B.1, B.1.1, B.1.1.1 y B.1.205, según el comité Pango de los genomas. La cepa prototipo corresponde a la variante B.1.1 y el análisis de las secuencias de los pasajes sucesivos mostró mutaciones a nivel de la proteína de la espiga (S) del virus, sin variación en la identidad del linaje. Conclusiones: Se aislaron 4 linajes en la línea celular Vero ATCC CCL-81. Los subcultivos en la misma línea celular muestran mutaciones en la proteína de la espiga, lo que indica mayor adaptabilidad a la célula hospedera y variación de la patogenicidad in vitro, comportamiento que le permite tener más éxito de supervivencia.

Introduction: Currently, infections caused by the SARS-CoV-2 virus exceed 600 million cases in the world. Objective: Isolation and characterization of the SARS-CoV-2 virus causing COVID-19 at the beginning of the pandemic in Peru. Materials and methods: Twenty nasal and pharyngeal swab samples were isolated from SARS-CoV-2 using two cell lines, Vero ATCC CCL-81 and Vero E-6; virus identification was performed by RT-PCR and the onset of cytopathic effect (CPE) was evaluated by indirect immunofluorescence and subsequent identification by genomic sequencing. One of the most widely circulating isolates were selected and named the prototype strain (PE/B.1.1/28549/2020). Then 10 successive passages were performed on Vero ATCC CCL-81 cells to assess mutation dynamics. Results: We detected 11 virus isolates by cytopathic effect, and subsequently confirmed by RT-PCR and indirect immunofluorescence. Of these, six were sequenced and identified as the lineages B.1, B.1.1, B.1.1.1, and B.1.205 according to the Pango lineage nomenclature. The prototype strain corresponded to lineage B.1.1. The analysis of the strains from the successive passages showed mutations mainly at in the spike (S) protein of the virus without variation in the identity of the lineage. Conclusions: Four lineages were isolated in the Vero ATCC CCL-81 cell line. Subcultures in the same cell line show mutations in the spike protein indicating greater adaptability to the host cell and variation in pathogenicity in vitro, a behavior that allows it to have more survival success.

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Introdução: Durante a pandemia de COVID-19, tornou-se necessário o uso de estratégias no tratamento dos pacientes que evoluem com insuficiência respiratória aguda. Objetivo: Avaliar o uso de estratégias não invasivas no desfecho de pacientes com insuficiência respiratória aguda ou crônica agudizada por COVID-19. Métodos: Pesquisa de caráter observacional e retrospectivo por meio da coleta de dados em prontuário eletrônico com pacientes submetidos ao uso de cânula nasal de alto fluxo (CNAF) e/ou ventilação mecânica não invasiva (VNI). Resultados: 81 pacientes, sendo 70,4% (57) do sexo masculino, com 56,5 ± 14,6 anos. 49,4% (40) dos indivíduos fizeram uso de CNAF e VNI, 9,9% (8) e 40,7% (33) apenas VNI ou CNAF, respectivamente. O tempo médio de uso da CNAF foi de 4,4 ± 3,7 dias e de VNI foi de 2,7 ± 3,4 dias. Observou-se que 43 (53,1%) dos pacientes pesquisados evoluíram para intubação orotraqueal (IOT) e 40 (49,4%) para óbito. Destes, 22 encontravam-se em IOT. Houve diferença estatística quando comparados idade entre os grupos IOT e não IOT, 60,5 ± 13,9 anos vs 52,1 ± 14,2 anos (p = 0,012), respectivamente. Conclusão: O uso de VNI e/ou CNAF pode ser considerado como alternativa no tratamento de pacientes com COVID-19. Contudo, os diversos fatores intrínsecos e extrínsecos ao paciente ainda contribuem para a alta taxa de IOT e de mortalidade.

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RESUMO Objetivo: estimar a prevalência de COVID-19 entre os fisioterapeutas brasileiros e seus fatores associados. Método: estudo transversal, segundo inquérito on-line, com a participação de 670 fisioterapeutas de todas as regiões do Brasil. Utilizou-se uma adaptação do método respondent driven sampling ao ambiente virtual para a coleta de dados. Análises bivariadas e de regressão logística múltipla foram utilizadas para identificar associação entre o diagnóstico de COVID-19 e variáveis demográficas e ocupacionais. Consideraram-se variáveis estatisticamente significativas com base em um p<0,05. Resultados: a prevalência de COVID-19 foi de 30% (IC95%: 27,8-32,3). Fisioterapeutas da região Sudeste tiveram menores chances de receber diagnóstico de covid-19. Fisioterapeutas que prestaram assistência em hospital de campanha, que ficaram isolados da família e que têm crianças menores de 12 anos em casa tiveram chances aumentadas de diagnóstico da infecção. Conclusão: questões sociodemográficas e ocupacionais impactam no aumento do diagnóstico de COVID-19 entre profissionais fisioterapeutas, o que enfatiza a necessidade de um sistema de saúde de qualidade e igualitário nas diferentes regiões brasileiras.

RESUMEN Objetivo: evaluar la tasa de prevalencia del COVID-19 en fisioterapeutas de Brasil y analizar sus factores asociados. Método: realizamos un estudio transversal mediante una encuesta on-line, en la que participaron 670 fisioterapeutas de todas las áreas de Brasil. Para la recogida de datos se utilizó una adaptación del método respondent driven sampling al entorno virtual. Se utilizaron análisis bivariados y de regresión logística múltiple para identificar la asociación entre el diagnóstico COVID-19 y variables demográficas y ocupacionales. Las variables se consideraron estadísticamente significativas en función de una p<0,05. Resultados: la prevalencia de COVID-19 fue del 30% (IC 95%: 27,8-32,3). Los fisioterapeutas del sudeste tenían menos probabilidades de ser diagnosticados de COVID-19. Los fisioterapeutas que prestaban asistencia en un hospital de campaña, que estaban aislados de sus familias y que tenían hijos menores de 12 años en casa tenían más probabilidades de que se les diagnosticara la infección. Conclusiones: aspectos sociodemográficos y ocupacionales inciden en el aumento del diagnóstico de COVID-19 entre los fisioterapeutas profesionales, lo que enfatiza la necesidad de un sistema de salud de calidad e igualitario en las diferentes regiones brasileñas.

ABSTRACT Objective: to estimate the prevalence of COVID-19 among Brazilian physiotherapists and its associated factors. Method: cross-sectional study, according to an online survey, with the participation of 670 physiotherapists from all regions of Brazil. An adaptation of the respondent driven sampling method to the virtual environment was used to collect data. Bivariate and multiple logistic regression analyzes were used to identify associations between the diagnosis of COVID-19 and demographic and occupational variables. Variables were considered statistically significant based on p<0.05. Results: the prevalence of COVID-19 was 30% (95%CI: 27.8-32.3). In the Southeast region, physiotherapists were less likely to be diagnosed with COVID-19. Physiotherapists who provided care in a field hospital, who were isolated from their families and who have children under 12 years of age at home had an increased chance of being diagnosed with the infection. Conclusion: sociodemographic and occupational issues impact the increase in COVID-19 diagnoses among physiotherapists, which emphasizes the need for a quality and egalitarian health system in different Brazilian regions.

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OBJECTIVES: To identify gestational complications associated with SARS-CoV-2 infection in pregnant women during 2020-2021. CONTENT: The risk of gestational complications was confirmed during SARS-CoV and MERS-CoV infection. However, this is not robust for COVID-19 because there is still no scientific evidence from longitudinal studies. A systematic review was performed using four databases, and 14 prospective or retrospective cohorts were finally included in the analysis. SUMMARY: The most frequently associated sociodemographic characteristic or comorbidity was the presence of any previous comorbidity (9 studies, 64.3%), followed by ethnicity and age (6 studies each one, 42.9%). The most frequently associated gestational complications in mothers were the admission to Intensive Care Unit (4 studies, 28.6%) and gestational age at delivery <37 weeks (3 studies, 21.4%). The most frequently associated gestational complications in newborns were preterm birth (4 studies, 28.6%) and the admission to Neonatal Intensive Care Unit (2 studies, 14.3%). OUTLOOK: Pregnant women infected with SARS-CoV-2 appear to have a higher risk of admission to Intensive Care Unit. Newborns of mothers infected with SARS-CoV-2 appear to have a higher risk of preterm birth and admission to Neonatal Intensive Care Unit.

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Abstract This study presents a 47-year-old female patient, with a history of diabetes, who contracted SARS-CoV-2 and exhibited cardiovascular complications.

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The WHO COVID-19 Clinical management: living guidance contains the Organization's most up-to-date recommendations for the clinical management of people with COVID-19. Providing guidance that is comprehensive and holistic for the optimal care of COVID-19 patients throughout their entire illness is important. The latest version of this living guideline is available in pdf format (via the 'Download' button) and via an online platform, and is updated regularly as new evidence emerges. No further updates to the previous existing recommendations were made in this latest version. This updated (fifth) version contains 16 new recommendations for the rehabilitation of adults with post COVID-19 condition (see Chapter 24), which includes: strong recommendation that exertional desaturation and cardiac impairment following COVID-19 should be ruled out and managed before consideration of physical exercise training

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Despite SARS-CoV-2 being a "novel" virus, early detection of anti-spike IgG in severe COVID-19 patients may be caused by the amplification of humoral memory responses against seasonal coronaviruses. Here, we examine this phenomenon by characterizing anti-spike IgG responses in non-hospitalized convalescent individuals across a spectrum of COVID-19 severity. We observe that disease severity positively correlates with anti-spike IgG levels, IgG cross-reactivity against other betacoronaviruses (ß-CoVs), and FcγR activation. Analysis of IgG targeting ß-CoV-conserved and non-conserved immunodominant epitopes within the SARS-CoV-2 spike protein revealed epitope-specific relationships: IgG targeting the conserved heptad repeat (HR) 2 region significantly correlates with milder disease, while targeting the conserved S2'FP region correlates with more severe disease. Furthermore, a lower HR2-to-S2'FP IgG-binding ratio correlates with greater disease severity, with ICU-hospitalized COVID-19 patients showing the lowest HR2/S2'FP ratios. These findings suggest that HR2/S2'FP IgG profiles may predict disease severity and offer insight into protective versus deleterious humoral recall responses.

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Introduction: The 2019 coronavirus disease (COVID-19) pandemic, should be an opportunity to ensure greater visibility of nursing in health systems and society worldwide. Objective: Review and synthesize the patterns on COVID-19 and nursing research, identifying the main journals, country of origin, language, topics, designs, and area of applicability of the results. Materials and Methods: Systematic review. Searches in PubMed, CINAHL, LILACS, and EMBASE databases (from the inception of the pandemic to May 15, 2020) were performed. Articles of any language related were related to SARS-CoV-2 infection or COVID-19 disease and nursing in any of its roles (care, management, education, among others) and using any epidemiological design or a scientific report were included. Two reviewers independently selected the studies and extracted the data. The main findings from the included studies were summarized through narrative synthesis and descriptive tables. The characteristics of the studies were presented as absolute values and proportions. Results: Three hundred and sixty-five articles were assessed for eligibility. Thirty-eight were included, published in 28 journals. Of those, 53.57% (n=15) were nursing specific. Most articles were "narrative reviews", accounting for 23.68% (n=9). Most studies were conducted in China (n=18, 47.37%), followed by the United Kingdom and the United States. Thirty-four (89.47%) articles were published in English, followed by Portuguese and Chinese. We identified five areas of application of the results, and the most frequent was the "clinical" setting with 47.00% (n=18). Discussion: These findings are crucial to give visibility to nursing work during the emergency of the COVID-19 pandemic. Mental health was the main research topic, while the clinical setting concentrates the major number of articles. This pattern was aligned with the challenges of the initial phase of the pandemic. Conclusion: Future research should explore the current state of evidence in the main topics identified in this review and continue to give visibility to work carried out by nursing in the emergency of the COVID-19 pandemic.

Introducción: La pandemia de la enfermedad de coronavirus 2019 (COVID-19), debería ser una oportunidad para asegurar una mayor visibilidad de la enfermería en los sistemas de salud y la sociedad en todo el mundo. Objetivo: Revisar y sintetizar los patrones de investigación en enfermería y COVID-19, identificando las principales revistas, país de origen, idioma, temas, diseños y área de aplicabilidad de los resultados. Materiales y Metodos: Una revisión sistemática. Se realizaron búsquedas en las bases de datos PubMed, CINAHL, LILACS y EMBASE (desde el inicio de la pandemia hasta el 15 de mayo de 2020). Se incluyeron artículos de cualquier idioma relacionados con la infección por SARS-CoV-2 o COVID-19 y enfermería en cualquiera de sus roles (cuidado, administración, educación, entre otros) que utilizaron cualquier diseño epidemiológico o informe científico. Dos revisores seleccionaron de forma independiente los estudios y extrajeron los datos. Los principales hallazgos de los estudios incluidos se resumieron mediante una síntesis narrativa y tablas descriptivas. Las características de los estudios se presentaron como valores absolutos y proporciones. Resultados: En 325 artículos se evaluaron los criterios de elegibilidad y se incluyeron 38 publicados en 28 revistas. De ellos, el 53,57% (n=15) eran específicos de enfermería. La mayoría de los artículos fueron "revisiones narrativas", que representan el 23,68% (n=9). La mayoría de los estudios se realizaron en China (n=18, 47,37%), seguido de Reino Unido y Estados Unidos. Treinta y cuatro (89,47%) artículos se publicaron en inglés, seguidos de portugués y chino. Identificamos cinco áreas de aplicación de los resultados y la más frecuente fue el ámbito "clínico" con un 47,00% (n=18). Discusión: Estos hallazgos son cruciales para dar visibilidad al trabajo de enfermería en la emergencia de la pandemia COVID-19. Se destaca que la salud mental fue el principal tópico de investigación mientras que el escenario clínico concentró el mayor número de artículo. Este patrón estuvo alineado con los desafíos impuestos por la fase inicial de la pandemia. Conclusión: Las investigaciones futuras deberán explorar el estado actual de la evidencia en los principales temas identificados en esta revisión y continuar dando visibilidad al trabajo realizado por enfermería en la emergencia de la pandemia por COVID-19.

Introdução: A pandemia da doença coronavírus (COVID-19) de 2019 deve ser uma oportu-nidade para garantir maior visibilidade da enfermagem nos sistemas de saúde e na sociedade em todo o mundo. Objetivo: Revisar e sintetizar os padrões de pesquisa em enfermagem e COVID-19, identificando as principais revistas, país de origem, língua, tópicos, desenhos e área de aplicabilidade dos resultados. Materiais e Métodos: Uma revisão sistemática. As ba-ses de dados PubMed, CINAHL, LILACS e EMBASE foram pesquisadas (Do início da pan-demia até 15 de maio de 2020). Artigos de qualquer língua relacionados à infecção por SARS-CoV-2 ou COVID-19 e enfermagem foram incluídos em qualquer das suas funções (assistên-cia, administração, educação, entre outras) que utilizassem qualquer desenho epidemiológico ou relatório científico. Dois revisores selecionaram independentemente estudos e extraíram os dados. As principais conclusões dos estudos incluídos foram resumidas através de uma síntese narrativa e tabelas descritivas. As características dos estudos foram apresentadas em valores absolutos e proporções. Resultados: Em 325 artigos foram avaliados os critérios de elegibili-dade e incluídos 38 publicados em 28 revistas. Destes, 53,57% (n=15) eram específicos da enfermagem. A maioria dos artigos eram "revisões narrativas", representando 23,68% (n=9). A maioria dos estudos foi realizada na China (n=18, 47,37%), seguida do Reino Unido e dos Estados Unidos. Trinta e quatro (89,47%) artigos foram publicados em inglês, seguidos de português e chinês. Identificamos cinco áreas de aplicação dos resultados e a mais frequente foi a área "clínica" com 47,00% (n=18). Discussão: Estas conclusões são cruciais para dar vi-sibilidade ao trabalho de enfermagem durante a emergência da pandemia da COVID-19. A saúde mental foi o principal tema de investigação, enquanto que o cenário clínico concentra o maior número de artigos. Este padrão foi alinhado com os desafios da fase inicial da pande-mia. Conclusão: A investigação futura deve explorar o estado atual das provas nos principais tópicos identificados nesta revisão e continuar a dar visibilidade ao trabalho realizado pela enfermagem na emergência da pandemia da COVID-19.

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