Fig. 2From: The priming effect of previous natural pandemic H1N1 infection on the immunogenicity to subsequent 2010-2011 influenza vaccination in children: a prospective cohort studySeroprotection rate and geometric mean titer of antihaemagglutinin anibody to H1N1 pdm09 in total subjects at base line, 1 month, and 6 months after vaccinationBack to article page