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Flu Season

2017-2018 Influenza (Flu) Season

Routine annual influenza vaccination is recommended for all people aged 6 months and older.

For the 2017–18 season, a variety of flu vaccines will be available. Quadrivalent influenza vaccines prevent against 4 flu strains, while trivalent influenza vaccines prevent against 3 flu strains. Inactivated influenza vaccines (IIVs) will be available in trivalent (IIV3) and quadrivalent (IIV4) formulations. Recombinant influenza vaccine (RIV) will be available in trivalent (RIV3) and quadrivalent (RIV4) formulations.

Like last flu season, live attenuated influenza vaccine (also known as nasal spray or FluMist) is not recommended for use during the 2017–18 season due to concerns about its effectiveness.

For more information on the recommendations for the 2017-18 Influenza Season, visit the CDC’s website.

Flu Surveillance

The flu is unpredictable. While seasonal flu outbreaks can happen as early as October, most of the time flu activity peaks in between December and February, and activity can last as late as May. View the CDC’s FluView to monitor flu activity in the U.S. The CDC also receives weekly reports of hospitalizations and deaths that occur as a result of influenza. As of August 2017, 104 pediatric deaths have been reported to the CDC for the 2016-17 flu season.

Additional Resources

Flu Activity and Surveillance