Update: Influenza Activity in the United States During the 2018–19 Season and Composition of the 2019–20 Influenza Vaccine | MMWR

Update: Influenza Activity in the United States During the 2018–19 Season and Composition of the 2019–20 Influenza Vaccine | MMWR

MMWR: 2018-19 Flu Season Activity Update 

​The 2018–19 flu season was moderate in severity with two consecutive waves of influenza A activity of similar magnitude during the season: A(H1N1)pdm09 predominated from October 2018 to mid-February 2019, and A(H3N2) activity increased from mid-February to mid-May. The latest MMWR summarizes activity this season and includes the vaccine viruses recommended for next season's flu vaccines.     

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Update: Influenza Activity in the United States During the 2018–19 Season and Composition of the 2019–20 Influenza Vaccine

Weekly / June 21, 2019 / 68(24);544–551

Xiyan Xu, MD1; Lenee Blanton, MPH1; Anwar Isa Abd Elal1; Noreen Alabi, MPH1; John Barnes, PhD1; Matthew Biggerstaff, ScD1; Lynnette Brammer, MPH1; Alicia P. Budd, MPH1; Erin Burns, MA1; Charisse N. Cummings, MPH1; Shikha Garg, MD1; Rebecca Kondor, PhD1; Larisa Gubareva, PhD1; Krista Kniss, MPH1; Sankan Nyanseor, MPH1; Alissa O’Halloran, MSPH1; Melissa Rolfes, PhD1; Wendy Sessions, MPH1; Vivien G. Dugan, PhD1; Alicia M. Fry, MD1; David E. Wentworth, PhD1; James Stevens, PhD1; Daniel Jernigan, MD1 (View author affiliations)