The American Pharmacists Association reports the following strains were recommended for the trivalent vaccine:
- A/California/7/2009 (H1N1)pdm09-like virus
- A/Hong Kong/4801/2014 (H3N2)-like virus
- B/Brisbane/60/2008-like virus (B/Victoria lineage)
For the quadrivelent vaccine, the WHO recommended the inclusion of B/Phuket/3073/2013-like virus (B/Yamagata lineage).
The current flu season vaccine cocktail, which the CDC has found to be 59 percent effective, includes:
- A/California/7/2009 (H1N1)pdm09-like virus
- A/Switzerland/9715293/2013 (H3N2)-like virus
- B/Phuket/3073/2013-like virus
This year’s quadrivalent vaccine included B/Brisbane/60/2008-like virus.
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