Soon after U.S. regulators paused the use of the J&J single-dose vaccine, health authorities in many European countries and in South Africa announced that they were also putting it on hold.
Government health officials are recommending a "pause" in vaccinations with the Johnson & Johnson COVID-19 vaccine. We're answering your questions as we learn more.
COVID-19 can cause symptoms that go well beyond the lungs, from strokes to organ failure. To explain these widespread injuries, researchers are studying how the virus affects the vascular system.