FILE-This Thursday, April 8, 2021 file photo shows Kent State University students getting their COVID-19 vaccinations in Kent, Ohio.The nation's largest traditional supermarket chain and some college campuses are among the Ohio providers that temporarily stopped using the Johnson & Johnson coronavirus vaccine Tuesday, April 13, while federal officials investigate reports of potentially dangerous blood clots. Kent State University said it was postponing its J&J clinics until further notice. (AP Photo/Phil Long, File)

FILE-This Thursday, April 8, 2021 file phtoto shows Kent State University student Regan Raeth, of Hudson, Ohio, having her COVID-19 vaccination administered by Kent State nurse Kristen Barath in Kent, Ohio. The nation's largest traditional supermarket chain and some college campuses are among the Ohio providers that temporarily stopped using the Johnson & Johnson coronavirus vaccine Tuesday, April 13, while federal officials investigate reports of potentially dangerous blood clots. Kent State University said it was postponing its J&J clinics until further notice. (AP Photo/Phil Long, File)

FILE-This Thursday, April 8, 2021 file photo shows Kent State University student Regan Raeth of Hudson, Ohio, has her COVID-19 vaccination administered by Kent State nurse Kristen Barath in Kent, Ohio. The nation's largest traditional supermarket chain and some college campuses are among the Ohio providers that temporarily stopped using the Johnson & Johnson coronavirus vaccine Tuesday, April 13, while federal officials investigate reports of potentially dangerous blood clots. Kent State University said it was postponing its J&J clinics until further notice. (AP Photo/Phil Long, File)