2019-2020 Influenza Season

2019-2020 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.

ACOG Flu & Pregnancy Resources

The 2019-2020 Influenza Vaccine:

The composition of U.S. flu vaccines is reviewed annually and updated to match circulating flu viruses. Flu vaccines protect against the three or four viruses that research suggests will be most common.

The Food and Drug Administration’s Vaccines and Related Biologic Products Advisory Committee (VRBPAC) recommended that the 2019 – 2020 influenza trivalent vaccine to be used in the United States contain:

  • an A/Brisbane/02/2018 (H1N1)pdm09-like virus
  • an A/Kansas/14/2017 (H3N2)-like virus
  • an B/Colorado/06/2017-like (Victoria lineage) virus

Four-component (quadrivalent) vaccines, which protect against a second lineage of B viruses, are recommended to be produced using the same viruses recommended for the trivalent vaccines, as well as a B/Phuket/3073/2013-like (Yamagata lineage) virus.

These vaccine recommendations were based on several factors, including global influenza virologic and epidemiologic surveillance, genetic and antigenic characterization, human serology studies, antiviral susceptibility, and the availability of candidate influenza viruses.

Visit CDC's website for more information on how influenza (flu) vaccines are made. 


Spotlight: The CDC's HCP Fight Flu Toolkit and Digital Media Toolkit for the 2019-20 Influenza Season

CDC released its HCP Fight Flu Toolkit which provides primary care physicians, nurses, pharmacists, and other healthcare professionals (HCP) with the resources needed to fight the flu in their practices. The materials will equip healthcare providers to make strong influenza vaccine recommendations, facilitate productive conversations with patients, and improve influenza vaccination rates.  

Additionally, the 2019–20 Digital Campaign Toolkit includes a listing of events, print-ready materials, sample social media and newsletter content, videos, web resources, and a flu vaccine finder. This material is downloadable and shareable. Important dates featured include the Seasonal Flu Kickoff Press Conference on September 26 and National Influenza Vaccination Week (NIVW), which runs from December 1–7.



Most Recent Influenza-Related Morbidity and Mortality Weekly Report (MMWR)

CDC's MMWR, Vital Signs: Burden and Prevention of Influenza and Pertussis Among Pregnant Women and Infants — United States

CDC's MMWRPrevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices — United States, 2019–20 Influenza Season

CDC's MMWRInfluenza Activity in the United States During the 2018–19 Season and Composition of the 2019–20 Influenza Vaccine


Featured Patient Education Materials 

                                               ACOG's Influenza Patient Education Graphic 


                         NFID : Flu in Adults Age 65 Years and Older: What Are the Risks? Infographic


       Updated 9/12/2019

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