RESUMEN

We calculated attack rates for household contacts of COVID-19 patients during the SARS-CoV-2 Omicron BA.2-dominant period in Japan. Attack rates among household contacts without recent (<3 months) vaccination was lower for contacts of index patients with complete vaccination than for contacts of index patients without complete vaccination, demonstrating indirect vaccine effectiveness.

Asunto(s)

Vacunas contra la COVID-19 , COVID-19 , Composición Familiar , SARS-CoV-2 , Eficacia de las Vacunas , Humanos , COVID-19/prevención & control , COVID-19/epidemiología , Japón/epidemiología , SARS-CoV-2/inmunología , Vacunas contra la COVID-19/inmunología , Vacunas contra la COVID-19/administración & dosificación , Vacunación , Trazado de Contacto , Masculino , Femenino