Influenza (Flu)

December 9, 2022—Flu season came early this year with some of the highest hospitalization rates seen at this time of the year in a decade. Preliminary data from CDC indicate that so far this season, nearly 50% of reported flu-associated…

January 11, 2023—CDC’s latest flu vaccination coverage estimates were updated on January 6, 2023. Estimates show that a drop in flu vaccine uptake observed early this season among adults overall has narrowed as the season has progressed;…

February 10, 2023—CDC reported 9 new flu-related pediatric deaths this week, bringing the total for the season to 106, the highest number of flu deaths in children since the start of the COVID-19 pandemic. Most of these children were not…

On December 3, 2021, this report was posted online as an MMWR Early Release.Miranda J. Delahoy, PhD1,2; Lindsey Mortenson, MD3; Laura Bauman, MPH4; Juan Marquez, MD4; Natasha Bagdasarian, MD5; Joseph Coyle, MPH5; Kelsey Sumner, PhD1,2;…

February 22, 2023—This year’s flu vaccines reduced the risk of influenza A-related hospitalization among children by nearly three quarters and among adults by nearly half according to CDC. Vaccination also provided significant protection…

Dr. Tim Uyeki, Chief Medical Officer of the Influenza Division at CDC, answers common questions about highly pathogenic avian influenza A(H5N1) viruses, which have been detected in the United States in wild birds since late 2021 and…

February 25, 2023 — Two human infections with avian influenza A H5N1 (H5N1 bird flu) virus have been reported by Cambodia. These cases are thought to be a result of exposure to infected birds/poultry. An investigation to try to confirm…

March 3, 2023—This update provides results of a preliminary assessment of the H5N1 viruses identified in two human infections detected in Cambodia in 2023 based on their genetic sequences and gives an update on the epidemiological…

As H5 Bird Flu Spreads South in the Americas, it Poses a Threat to Animal and Human Health March 14, 2023 – With avian influenza A H5 outbreaks in wild birds and poultry spreading to Latin America and the Caribbean, public health and…

April 14, 2023— The National Health Commission of the People’s Republic of China reported a confirmed case of human infection with avian influenza A(H3N8) virus “H3N8 bird flu” on March 27, 2023. The patient was an adult with multiple…

This week, CDC staff will be convening with leaders from animal and human health sectors across Southeast Asia to hone avian influenza (bird flu) preparedness in the region. The main purpose of this workshop is to share best practices in…

As flu activity in the United States continues at low levels that are typical for this time of year, CDC also is tracking flu activity in the Southern Hemisphere, which generally has its “flu season” at this time. Surveillance data show…

Recommendations for the Use of Influenza Vaccines, 2022–23 Groups Recommended for Vaccination Routine annual influenza vaccination is recommended for all persons aged ≥6 months who do not have contraindications. Recommendations…

The COVID-19 pandemic has affected influenza virus transmission, with historically low activity, atypical timing, or altered duration of influenza seasons during 2020–22 (1,2). Community mitigation measures implemented since 2020,…

Katherine Adams, MPH1,*; Katie J. Tastad, MPH1,*; Stacy Huang, MPH1,2; Dawud Ujamaa, MS1,3; Krista Kniss, MPH1; Charisse Cummings, MPH1; Arthur Reingold, MD4; Jeremy Roland, MPH4; Elizabeth Austin, MPH5; Breanna Kawasaki, MPH5; James…

Christine M. Thomas, DO1,2; Elizabeth B. White, PhD1,3; Noah Kojima, MD1,3; Mary-Margaret A. Fill, MD2; Samir Hanna, MD2; Timothy F. Jones, MD2; Caitlin N. Newhouse, MD2; Kelly Orejuela, MPH2; Emma Roth, MPH2; Sarah Winders, MPH2;…

FluSurv-NET A total of 2,339 laboratory-confirmed influenza-associated hospitalizations were reported by FluSurv-NET sites between October 1, 2021, and April 2, 2022. The overall cumulative hospitalization rate was 8.0 per 100,000…

Note: “Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices — United States, 2021-2022 Influenza Season” has been published. More information on the upcoming…