CDC Features

Influenza vaccines - United States, 2018-19 influenza season

U.S. Influenza Vaccine Products for the 2018-19 Season

Influenza Virus Testing Methods

A table for health professionals showing various testing methods for the influenza virus.

FluView - Weekly Influenza Surveillance Report

During week 25 (June 18-June 24, 2017), flu activity in the U.S. has continued to decrease and the 2016-2017 flu season has peaked.

Situation Update: Summary of Weekly FluView Report

According to the FluView report for the week ending March 4, 2017 (week 9), while flu activity remained elevated for the 12th consecutive week, the season has likely peaked.

Outbreak of North American Avian Influenza A(H7N9) in Poultry Poses Low Risk to People

CDC is working closely with USDA APHIS and the Tennessee Department of Health to minimize any human health risk posed by the avian influenza outbreak in Lincoln County, Tennessee.

Increase in Human Infections with Avian Influenza A(H7N9) Virus During the Fifth Epidemic - China

Increase in Human Infections with Avian Influenza A(H7N9) Virus During the Fifth Epidemic - China, October 2016-February 2017

Antigenic and Genetic Characteristics of Zoonotic and Candidate Flu Viruses Developed for Vaccines

This summary provides a review on the zoonotic influenza virus activity and virus characterization, and describes the current status of the development of candidate vaccine viruses for pandemic prepar

Recommended Composition of Flu Vaccines for Use in the 2017-2018 Northern Hemisphere Flu Season

Recommendations for trivalent vaccines for use in the 2017-2018 northern hemisphere influenza season.

Update: Influenza Activity - United States, October 2, 2016-February 4, 2017

This report summarizes U.S. influenza activity* during October 2, 2016-February 4, 2017,† and updates the previous summary (1). Influenza activity in the United States began to increase in mid-Decem

Interim Estimates of 2016-17 Seasonal Influenza Vaccine Effectiveness - United States, February 2017

In the United States, annual vaccination against seasonal influenza is recommended for all persons aged ≥6 months (1). Each influenza season since 2004-05, CDC has estimated the effectiveness of sea

CDC Reports This Season's Flu Vaccine Reducing Risk by Nearly Half

Based on early data, CDC reports that flu vaccines this season are reducing a vaccinated person's risk of getting sick and having to go to the doctor because of flu by about half (48%). The agency als

Summary of Influenza Risk Assessment Tool (IRAT) Results

The Influenza Risk Assessment Tool (IRAT) is an evaluation tool conceived by CDC and further developed with assistance from global animal and human health influenza experts.