Four people have been hospitalized among 18 evaluated after they experienced adverse reactions after receiving the Johnson & Johnson coronavirus vaccine at the PNC Arena clinic in Raleigh, North Carolina.

Wake County paused use of J&J’s coronavirus vaccine Thursday after “several” people experienced adverse reactions, according to reporter Joe Fisher.

Three vaccines — Pfizer, Moderna and Johnson & Johnson — have been authorized for emergency use in the United States.

Johnson & Johnson said “we carefully review reports of adverse events” after 11 people experienced reactions at another vaccination site Wednesday in Commerce City, Colorado, FOX31 Denver reported.