East Tennessee State University will resume its Johnson & Johnson vaccine clinics this week, which have been on hold since use of the vaccine was paused while federal officials investigated reports of rare but serious blood clots in people who received the vaccine. After a 10-day pause in which the U.S. Food and Drug Administration and Centers for Disease Control and Prevention investigated the vaccine, it was authorized for use again on April 23 with a warning about the potential side-effect. ETSU announced three new Johnson & Johnson clinics on Thursday, set to take place on Friday, Saturday and Tuesday from noon to 2 p.m.