Seroprevalence of Influenza A(H1N1)pdm09 Virus Antibody, England, 2010 and 2011 - - Emerging Infectious Disease journal - CDC
Table of Contents
Volume 18, Number 11–November 2012
Seroprevalence of Influenza A(H1N1)pdm09 Virus Antibody, England, 2010 and 2011
Seroepidemiologic data collected in England during the first 2 influenza pandemic waves suggested that another wave of infection with influenza A(H1N1)pdm09 virus was unlikely during 2010–11 (1). However, a substantial third wave occurred that affected persons in older age groups (2). Severity indicators suggested a higher level of illness and death, with increased cases in critical care and deaths. We conducted further seroepidemiologic study in England during 2010–11 to identify possible reasons for these observations.