LONDON (AP) - Britain’s health chief has hailed a new study suggesting that a single dose of the Oxford-AstraZeneca COVID-19 vaccine provides a high level of protection for 12 weeks, saying it ...

New research suggests that a 12-week gap between doses of the Oxford-AstraZeneca vaccine might be better than a shorter interval. THOMAS SAMSON/POOL/AFP via Getty Images The efficacy of some COVID-19 ...

(Reuters) -AstraZeneca's COVID-19 vaccine carries a small extra risk of rare blood clots with low platelets after the first dose and no extra risk after the second, a study led and funded by the ...

Hundreds of thousands of Canadians got a shot of AstraZeneca’s COVID-19 vaccine for their first dose. They now have a choice for their second dose: AstraZeneca again, or Pfizer or Moderna mRNA vaccine ...

PARIS (Reuters) - France's top health body will on Friday say that recipients of a first dose of AstraZeneca's traditional COVID-19 vaccine who are under 55 should get a second shot with a new-style ...