What question did this study set out to answer?

Assess the effectiveness of 2014-2015 influenza vaccines against various virus types.

October 4, 2016Clinical Infectious Diseases273 citationsOpen Access

2014–2015 Influenza Vaccine Effectiveness in the United States by Vaccine Type

RZRichard K. ZimmermanUniversity of Pittsburgh MNMary Patricia NowalkUniversity of Pittsburgh JCJessie R. ChungCenters for Disease Control and Prevention

Key Points

Assess the effectiveness of 2014-2015 influenza vaccines against various virus types.
Analyzed vaccine performance among different influenza strains.
Evaluated protection levels specifically against influenza A/H3N2 and B.
Considered the impact of live attenuated influenza vaccine (LAIV) usage in young children.
Limited protection against influenza A/H3N2 virus was observed.
Influenza B vaccine showed effective protection.
No support for preferential use of LAIV among young children.

Abstract

The 2014-2015 influenza vaccines offered little protection against the predominant influenza A/H3N2 virus but were effective against influenza B. Preferential use of LAIV among young children was not supported.

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