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A vial of the Johnson & Johnson Janssen Covid-19 vaccine at a vaccination center in Chicago, Illinois, on March 5, 2021. Photo: Kamil Krzaczynski / AFP
A vial of the Johnson & Johnson Janssen ... […]

Clot questions over J&J and AstraZeneca vaccines

The European Medicines Agency (EMA) says blood clots should be listed as a "very rare" side effect of the Johnson & Johnson COVID vaccine. What we know about the jab and similar AstraZeneca shot: