The Centers for Diseases Control and Prevention and the Food and Drug Administration recommended pausing the use of the Johnson & Johnson single-dose COVID-19 vaccine in the U.S. on April 13 due to âa small number of reports of a rare and severe type of blood clotâ among those who had received the vaccine, according to the CDC. In nearly 7 million people who received the J&J vaccine, six cases of these blood clots have been reported, all of them among women ages 18 to 48. Previously, the J&J vaccine was one of three COVID-19 vaccine options found at pharmacies and health centers around Athens, along with the two-dose Moderna and Pfizer vaccines. The University of Georgiaâs Health Center was offering all three vaccines to students until Tuesdayâs CDC guidance was released.