2017-2018 Influenza Season


2017-2018 Influenza Vaccination Recommendations:

Visit ACOG's Immunization Newsletter for monthly updates on the Influenza season!

Pregnant Women:
Pregnant women are at particularly high risk of severe illness and complications from influenza disease. Learn more at the Flu & Pregnancy page.

CDC, ACOG, and other partnering organizations encourage providers to administer influenza and Tdap vaccine during pregnancy. Letter to Health Care Providers of Pregnant Women

ACOG Flu & Pregnancy Resources

The 2017-2018 Influenza Vaccine:

On March 9, 2017, the Food and Drug Administration's Vaccines and Related Biologics Advisory Committee (VRBPAC) endorsed the WHO-recommended vaccine viruses for use in all U.S. seasonal flu vaccines for the 2017-2018 flu season. It was recommended that trivalent vaccines for use in the 2017-2018 influenza season (Northern Hemisphere winter) contain the following:

  • an A/Michigan/45/2015 (H1N1)pdm09-like virus;
  • an A/Hong Kong/4801/2014 (H3N2)-like virus;
  • a B/Brisbane/60/2008-like virus (B/Victoria lineage).

It was recommended that quadrivalent vaccines containing two influenza B viruses contain the above three viruses and a B/Phuket/3073/2013-like (B/Yamagata lineage) virus.

This represents an update in the H1N1 component of the vaccine compared to 2016-2017 Northern Hemisphere seasonal influenza vaccines.

CDC's HAN, Seasonal Influenza A(H3N2) Activity and Antiviral Treatment of Patients with Influenza (12/27/17)

CDC's MMWR Update: Influenza Activity - United States, October 1 - November 25, 2017 (12/8/17)

CDC's MMWR Influenza Vaccination Coverage Among Pregnant Women - United States, 2016-17 Influenza Season (9/29/17)

CDC's MMWR Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices - United States, 2017-18 Influenza Season (8/25/17)

CDC's MMWR Update: Influenza Activity in the United States During the 2016-17 Season and Composition of the 2017-18 Influenza Vaccine (6/30/17)


flu shot in pregnancy

Flu vaccination: a growing trend among pregnant women

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