Influenza Surveillance Data

Weekly U.S. Influenza Surveillance Report

Laboratory confirmed flu activity as reported by clinical laboratories continued to decrease; however, influenza-like illness activity increased.

Interim Estimates of 2017-18 Seasonal Influenza Vaccine Effectiveness - United States, February 2018

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

Update: Influenza Activity - United States, October 1, 2017-February 3, 2018

Influenza activity in the United States began to increase in early November 2017 and rose sharply from December through February 3, 2018; elevated influenza activity is expected to continue for severa

Study of Flu-Related Deaths in Children Shows Healthy Children at Risk

CDC study published in the journal Pediatrics shows just how vulnerable U.S. children are to the flu each year. The study, titled "Influenza-Associated Pediatric Deaths in the United States, 2010-2016

How many flu-associated deaths occur in people who have been vaccinated?

Flu-associated deaths in adults are not a nationally notifiable condition, and so states are not required to report flu-associated deaths in adults to CDC.

Frequently Asked Flu Questions 2017-2018 Influenza Season

Getting an annual flu vaccine is the first and best way to protect yourself and your family from the flu. Flu vaccination can reduce flu illnesses, doctors' visits, and missed work and school due to f

Update: Influenza Activity - United States, October 1-November 25, 2017

Influenza activity in the United States was low during October 2017, but has been increasing since the beginning of November. Influenza A viruses have been most commonly identified, with influenza A(H

CDC Study Finds Flu Vaccine Saves Children's Lives

A new CDC study published today in Pediatrics is the first of its kind to show that flu vaccination significantly reduced a child's risk of dying from influenza.