New CDC Study on Household Spread of Flu

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January 27, 2023

Flu Weekly Newsletter

Influenza (Flu)
2022 - 2023 Flu Season 

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Weekly U.S. Influenza Surveillance Report

Flu activity continues to decline across the country. CDC also is reporting six flu-related deaths in children this week for a total of 91 this season. Annual flu vaccination is still recommended as long as flu activity is ongoing.

Weekly U.S. Influenza Surveillance Report map showing intensity of flu infections
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A couple simultaneously sneezes into tissues while sitting at home on the couch with a blanket over them.

New CDC Study on Household Spread of Flu

A new CDC study found household spread of flu more than doubled during the 2021-2022 season compared to the 2017-2018 and 2018-2019 (pre-COVID-19 pandemic) flu seasons. This could be because of reduced population immunity to flu, lower flu vaccination coverage among some groups, and/or the fact that people were spending more time at home.  
Bar graph titled “Flu Vaccination Coverage among Pregnant People 18 to 49 Years of Age.” The bars on the graphs show changes by race and ethnicity from 2021-2022 to 2022-2023. Subtitle reads: "As of the end of December 2022, flu vaccination coverage among pregnant people has decreased across all race and ethnicity groups compared to the same time last season." Data are as follows: Overall: 2022-2023: 47.1%; 2021-2022: 56.3%; Asian Non-Hispanic: 2022-2023: 65.2%; 2021-2022: 76.0%; White, Non-Hispanic: 2022-2023: 47.1%; 2021-2022: 58.2%; Other, Non-Hispanic: 2022-2023: 46.3%; 2021-2022: 55.4%; Hispanic: 2022-2023: 46.1%; 2021-2022: 53.2%; Black, Non-Hispanic: 2022-2023: 28.4%; 2021-2022: 31.6%

Flu Vaccination is Important during Pregnancy
Flu vaccination coverage among pregnant people is lower this season compared to recent seasons. As of the end of December 2022, coverage was 9.2 percentage points lower than at the end of December 2021. Declines in coverage among pregnant people were observed for all race and ethnicity groups, with the lowest coverage among non-Hispanic, Black pregnant people (28.4%).

Twitter @CDCFlu

#DYK? #Flu viruses spread mainly by droplets made when people with flu cough, sneeze, or talk. Staying home and keeping your distance from others if you have flu is a good way to protect others.  https://bit.ly/2MJ9QqJ

  

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