Flu_Season_37300

FILE - This Jan. 23, 2020 file photo shows a patient receiving a flu vaccination in Mesquite, Texas. On Thursday, Feb. 20, 2020, the U.S. Centers for Disease Control and Prevention said the vaccine has been more than 50% effective in preventing flu illness severe enough to send a child to the doctor's office. Health experts consider that pretty good. (AP Photo/LM Otero, File)