Antibody responses to influenza a H1N1 vaccine compared to the circulating strain in influenza vaccine recipients during the 2013/2014 season in North America

摘要

Background: Influenza strain A/California/07/2009 H1N1 (H1N1-09) reemerged in 2013/2014 as the predominant cause of illness. We sought to determine if antigenic drift may have contributed to the decreased responses to influenza vaccine.