· During July 11, 2018–March 29, 2019 in the United States, the Vaccine Adverse Event Reporting System (VAERS) received 125 reports of 192 patients receiving expired IIV during the 2018–19 influenza season (2), during which time 169.1 million doses of seasonal influenza vaccine were distributed (3). Dates of vaccination were documented for 102 patients and ….