National Health & Safety Blood Clot Concerns Put Johnson & Johnson Vaccine On Pause 4:09pm April 13, 2021 by Joe Palca Health Medical Treatments National Share URL copied to clipboard! Copyright 2021 NPR. To see more, visit https://www.npr.org. 300x250 Ad More All Things Considered Religion After his burial, visitors flock to Pope Francis's tomb. by Scott Detrow Economy Economic uncertainty remains amid Trump's tariffs 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate