has role has component immunizes against disease immunizes against pathogen has flu season influenza Influenza A virus Betainfluenzavirus influenza A virus A/California/7/2009 (H1N1) antigen inactivated influenza vaccine trivalent influenza vaccine 2012-2013 seasonal trivalent inactivated influenza vaccine (A/California/7/2009 (H1N1), A/Victoria/361/2011 (H3N2), and B/Wisconsin/1/2010) Oliver He 2012-2013 trivalent seasonal inactivated influenza vaccine 2012-2013 Influenza A virus (A/California/7/2009 (H1N1)), Influenza A virus (A/Victoria/361/2011 (H3N2)), and Influenza B virus (B/Wisconsin/1/2010) Randi Vita vaccine https://www.ncbi.nlm.nih.gov/pubmed/?term=30843873 influenza B virus B/Wisconsin/1/2010 antigen influenza A virus A/Victoria/361/2011 (H3N2) antigen inactivated vaccine role flu season 2012-2013