![Recommended composition of influenza virus vaccines for use in the 2019-2020 northern hemisphere influenza season Recommended composition of influenza virus vaccines for use in the 2019-2020 northern hemisphere influenza season](https://www.who.int/images/default-source/departments/global-influenza-programme/202009-recommendation-thumb.tmb-479v.png?Culture=en&sfvrsn=db3469ef_1)
Recommended composition of influenza virus vaccines for use in the 2019-2020 northern hemisphere influenza season
![Interim Flu Vaccine Effectiveness Estimates for the 2019-20 Flu Season Show Flu Vaccines Providing Substantial Protection, Especially in Children | CDC Interim Flu Vaccine Effectiveness Estimates for the 2019-20 Flu Season Show Flu Vaccines Providing Substantial Protection, Especially in Children | CDC](https://www.cdc.gov/flu/images/spotlights/vaccine-spotlight-600px.jpg)
Interim Flu Vaccine Effectiveness Estimates for the 2019-20 Flu Season Show Flu Vaccines Providing Substantial Protection, Especially in Children | CDC
![Estimated Influenza Illnesses, Medical visits, and Hospitalizations Prevented by Vaccination in the United States — 2019–2020 Influenza Season | CDC Estimated Influenza Illnesses, Medical visits, and Hospitalizations Prevented by Vaccination in the United States — 2019–2020 Influenza Season | CDC](https://www.cdc.gov/flu/images/about/burden-averted/benefits-of-flu-vaccination600.jpg?_=08089)
Estimated Influenza Illnesses, Medical visits, and Hospitalizations Prevented by Vaccination in the United States — 2019–2020 Influenza Season | CDC
![Interim Flu Vaccine Effectiveness Estimates for the 2019-20 Flu Season Show Flu Vaccines Providing Substantial Protection, Especially in Children | CDC Interim Flu Vaccine Effectiveness Estimates for the 2019-20 Flu Season Show Flu Vaccines Providing Substantial Protection, Especially in Children | CDC](https://www.cdc.gov/flu/images/spotlights/fight-flu-sm.jpg)