UNITED KINGDOM, Dec 7 — A major British study into mixing Covid-19 vaccines has found that people had a better immune response when they received a first dose of AstraZeneca or Pfizer-BioNTech shots followed by Moderna nine weeks later, according to the results on Monday.

PUTRAJAYA, July 29 — The United Kingdom (UK) is to contribute 415,000 doses of the UK manufactured AstraZeneca Covid-19 vaccines to Malaysia.