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MMWR Morb Mortal Wkly Rep. 2018 Jun 8;67(22):634-642. doi: 10.15585/mmwr.mm6722a4.

Update: Influenza Activity in the United States During the 2017-18 Season and Composition of the 2018-19 Influenza Vaccine.

Author information

1
Influenza Division, National Center for Immunization and Respiratory Diseases, CDC.

Abstract

The United States 2017-18 influenza season (October 1, 2017-May 19, 2018) was a high severity season with high levels of outpatient clinic and emergency department visits for influenza-like illness (ILI), high influenza-related hospitalization rates, and elevated and geographically widespread influenza activity across the country for an extended period. Nationally, ILI activity began increasing in November, reaching an extended period of high activity during January-February, and remaining elevated through March. Influenza A(H3N2) viruses predominated through February and were predominant overall for the season; influenza B viruses predominated from March onward. This report summarizes U.S. influenza activity* during October 1, 2017-May 19, 2018..

PMID:
29879098
PMCID:
PMC5991814
DOI:
10.15585/mmwr.mm6722a4
[Indexed for MEDLINE]
Free PMC Article

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