San Francisco ChronicleFlu shots and COVID: Do you need to worry about vaccine timing? What about a 'twindemic'?Oct 5, 2021Kellie HwangBy Kellie Hwangmore_vert
UC Davis HealthTwindemic warning: COVID-19 and flu season will collide this winterOct 8, 2021more_vert
The New York TimesC.D.C. Urges Flu Shots to Reduce Strain on Health Care SystemOct 9, 2021Jan HoffmanBy Jan Hoffmanmore_vert