Update: Influenza Activity in the United States During the 2018--19 Season and Composition of the 2019--20 Influenza Vaccine

Published on June 20, 2019

U.S. World Health Organization (WHO) collaborating laboratories and National Respiratory and Enteric Virus Surveillance System laboratories, which include both clinical and public health laboratories throughout the United States, contribute to virologic surveillance for influenza.

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Notes from the Field: Administration of Expired Injectable Influenza Vaccines Reported to the Vaccine Adverse Event Reporting System - United States, July 2018-March 2019

June 13, 2019
Influenza vaccination is recommended annually for persons aged ≥6 months for the prevention and control of influenza.

Cryptosporidiosis Outbreaks - United States, 2009-2017

June 27, 2019
Cryptosporidium is a parasite that causes cryptosporidiosis, a profuse, watery diarrhea that can last up to 3 weeks in immunocompetent patients and can lead to life-threatening malnutrition and wasting in immunocompromised patients.