The U.S. is looking into additional cases of severe side effects possibly linked to the Johnson & Johnson vaccine, according to Centers for Disease Control and Prevention director Dr. Rochelle Walensky.
“These have been a handful of cases, not an overwhelming number of cases,” Walensky said at a White House briefing on Monday. “We are working through and adjudicating them, and verifying whether they do, in fact, reflect a true case.”
