Assuntos
Síndrome da Imunodeficiência Adquirida/epidemiologia , Surtos de Doenças/epidemiologia , Homossexualidade , Síndrome da Imunodeficiência Adquirida/etiologia , Síndrome da Imunodeficiência Adquirida/mortalidade , Adolescente , Adulto , Centers for Disease Control and Prevention, U.S. , Métodos Epidemiológicos , Feminino , Haiti/etnologia , Hemofilia A/complicações , Humanos , Masculino , Pessoa de Meia-Idade , Pneumonia por Pneumocystis/epidemiologia , Risco , Sarcoma de Kaposi/epidemiologia , Fatores Sexuais , Transtornos Relacionados ao Uso de Substâncias/complicações , Estados UnidosRESUMO
Outbreaks of influenza due to the virus A/Hong Kong/1/68 (H3N2) began in 1968 and are still occurring. The haemagglutinin of this virus is different from that of the A/Singapore/1/57 virus (the "Asian" strain) but the neuraminidase antigens are the same. Between 1968 and 1971 only minor antigenic "drift" in the haemagglutinin was noted, but in recent months 2 isolates have been identified in which considerable "drift" has occurred in the haemagglutinin and in the neuraminidase antigens. One, A/Hong Kong/5/72 (H3N2), was first detected in outbreaks in Hong Kong between November 1971 and January 1972 and was predominant there and in Korea but did not become widely disseminated. The second strain, A/England/42/72 (H3N2), has been isolated in winter outbreaks in the southern hemisphere and now appears to be the predominant strain in the northern hemisphere. The characteristics of the strains are described.
Assuntos
Antígenos Virais , Genética Microbiana , Imunogenética , Orthomyxoviridae/imunologia , África , Ásia , Austrália , Europa (Continente) , Testes de Inibição da Hemaglutinação , Humanos , Imunodifusão , Influenza Humana/epidemiologia , Neuraminidase/antagonistas & inibidores , América do Norte , América do SulRESUMO
Knowledge of the rubella antibody profiles of female populations of various ages and in various geographical areas is essential for an intelligent and effective administration of rubella vaccine. The investigation reported was undertaken to extend a previous WHO collaborative study to include additional areas of the Americas. As in the other mainland areas included in the earlier study, the presence of rubella haemagglutination-inhibiting antibody was found to be a likely event in over 80% of the females of child-bearing age in Argentina, Brazil, Chile, urban Peru (Lima) and Uruguay. Antibody rates were significantly lower in Jamaica, Panama, rural Peru and Trinidad. These data confirm and extend earlier findings of low levels of rubella immunity in certain island or isolated populations.