Seroprevalence of Protective Antibodies Against Influenza and the Reduction of the Influenza Incidence Rate: An Annual Repeated Cross‐Sectional Study From 2014 to 2019
Raquel Guiomar,
Susana Pereira da Silva,
Inês Costa
et al.
Abstract:BackgroundSeroepidemiological studies provide estimates of population‐level immunity, prevalence/incidence of infections, and evaluation of vaccination programs. We assessed the seroprevalence of protective antibodies against influenza and evaluated the correlation of seroprevalence with the cumulative annual influenza incidence rate.MethodsWe conducted an annual repeated cross‐sectional seroepidemiological survey, during June–August, from 2014 to 2019, in Portugal. A total of 4326 sera from all age groups, se… Show more
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