For the 2022-2023 season, CDC has updated recommendations for the annual vaccine to include a closer antigenic match to the A(H3N2) subclade that predominated in the 2021-2022 US season.
For the 2022-2023 season, CDC has updated recommendations for the annual vaccine to include a closer antigenic match to the A subclade that predominated in the 2021-2022 US season, the report notes.Morbidity and Mortality Weekly Report
"Since SARS-CoV-2 emerged in the United States in early 2020, influenza activity has been lower than that seen before the pandemic," add the authors, from the CDC's Influenza Division of the National Center for Immunization and Respiratory Diseases. Using data available from early October 2021 through mid-June 2022, CDC estimated that influenza virus infection resulted in 8-13 million symptomatic illnesses, 3.7-6.1 million medical visits, 82,000-170,000 hospitalizations, and 5000-14,000 deaths.Clinical laboratories tested more than 2.8 million respiratory specimens for influenza virus. Overall, 4.5% specimens tested positive, including 98.6% for influenza A and 1.4% for influenza B. Each week, between 0.1% and 9.
Of the A viruses with age data available, the proportions reported were 10% in people aged 0-4 years, 51% in those aged 5-24 years, 28% in those aged 25-64 years, and 11% those aged 65 years or older. The numbers of reported Apdm09, B/Victoria, and B/Yamagata viruses were too low to analyze by age group.COVID-19 continued to dominate the deaths from pneumonia, influenza, and/or COVID-19 .
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