virus a B/Brisbane 60/2008-like antigens A separate vaccine was available for pandemic H1N1 influenza using the A/California/7/2009-like pandemic H1N1 strain. 2010–2011 flu season The vaccines produced for the 2010–2011 season used: an A/California/7/2009-like (pandemic H1N1) an A/Perth/16/2009-like (H3N2)-like virus a B/Brisbane/60/2008-like antigens 2011–2012 flu season The vaccines produced for the 2011–2012 season used: an A/California/07/2009 (H1N1)-like virus an A/Victoria/210/2009 (an A/Perth/16/2009-like strain) (H3N2)-like virus a B/Brisbane/60/2008-like virus 2012–2013 flu season The vaccines produced for the Northern Hemisphere 2012–2013 season used: an A/California/07/2009 (H1N1)-like virus an A/Victoria/361/2011 (H3N2)-like virus a B/Massachusetts/2/2012-like virus, which replaced B/Wisconsin/1/2010-like virus In January 2013, influenza activity continued to increase in the United States and most of the country experienced high levels of influenza-like-illness (ILI), according to CDC's latest FluView report. Reports of influenza-like-illness (ILI) are nearing what have been peak levels during moderately severe seasons, and CDC continues to recommend influenza vaccination and antiviral drug treatment when appropriate at this time. On January 9, 2013, the Boston Government declared a public health emergency for H3N2 influenza. 2014–2015 flu season The vaccines produced for the Northern Hemisphere 2014–2015 season used: A/California/7/2009 (H1N1)pdm09-like virus A/Texas/50/2012 (H3N2)-like virus B/Massachusetts/2/2012-like virus, Quadrivalent vaccines include a B/Brisbane/60/2008-like virus. The CDC announced that drift variants of the A (H3N2) virus strain from the 2012–2013 potentially foretold a severe flu season for 2014–2015. 2015–2016 flu season The vaccines produced for the Northern Hemisphere 2015–2016 season used: A/California/7/2009 (H1N1)pdm09-like virus A/Switzerland/9715293/2013 (H3N2)-like virus B/Phuket/3073/2013-like virus. (This is a B/Yamagata lineage virus) The "Split Virion" vaccine distributed in 2016 contained the following strains of inactivated virus: A/California/7/2009 (H1N1)pdm09 - like strain (A/California/7/2009, NYMC X-179A) A/Hong Kong/4801/2014 (H3N2) - like strain (A/Hong Kong/4801/2014, NYMC X-263B) B/Brisbane/60/2008 - like strain (B/Brisbane/60/2008, wild type) 2016–2017 flu season 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) Quadrivalent influenza vaccine adds: B/Phuket/3073/2013-like strain 2017–2018 flu season A/Michigan/45/2015 (H1N1)pdm09-like virus A/Hong Kong/4801/2014 (H3N2) B/Brisbane/60/2008-like virus (B/Victoria lineage) Quadrivalent influenza vaccine adds B/Phuket/3073/2013-like[B/Yamagata lineage] 2020-SH(southern hemisphere) Quadrivalent- A/Brisbane/02/2018 (H1N1)pdm09-like virus A/SouthAustralia/34/2019 (H3N2)-like virus B/Washington/02/2019-like virus [B/Victoria lineage] B/Phuket/3073/2013-like virus [B/Yamagata lineage] See also 2009 swine flu pandemic Bird flu Dog flu Horse flu Human flu Swine flu References Further reading Graphic showing H3N2 mutations, amino acid by amino acid, among 207 isolates completely sequenced by the Influenza Genome Sequencing Project. Influenza A (H3N2) Outbreak, Nepal Hot topic – Fujian-like strain A influenza New Scientist: Bird Flu External links Influenza