Influenza Activity and Composition of the 2022–23 Influenza Vaccine — United States, 2021–22 Season | MMWR - ISS-G20 Laboratorium Repository

What is already known about this topic?

CDC collects, compiles, and analyzes data on U.S. influenza activity and viruses.

What is added by this report?

The severity of the 2021–22 influenza season was low, with two waves of influenza A activity. Influenza activity continued from October 2021 through mid-June 2022, with A(H3N2) viruses predominating throughout the season. This report also describes the composition of the Northern Hemisphere 2022–23 influenza vaccine.

What are the implications for public health practice?

Because of the atypical timing and duration of influenza activity, providers and patients should consider influenza infection as a cause of respiratory illness. Testing for seasonal influenza and monitoring for novel viruses, especially avian A(H5N1) and swine viruses, should continue year-round. Receiving a seasonal influenza vaccine each year remains the best way to protect against seasonal influenza and its potentially severe consequences.

Entire content available on: https://www.cdc.gov/mmwr/volumes/71/wr/mm7129a1.htm?s_cid=mm7129a1_x