World How Worried Should You Be About the J&J Vaccine and Blood Clots? April 13, 2021Denise Grady and Carl ZimmerComments Off on How Worried Should You Be About the J&J Vaccine and Blood Clots? Out of an “abundance of caution,” the F.D.A. is advising doctors to pause the Johnson & Johnson vaccine while it investigates extremely rare blood clots.
