AstraZeneca Covid-19 vaccine shows promise in elderly, trial results by Christmas

AstraZeneca and Oxford University's potential Covid-19 vaccine produced a strong immune response in older adults, data published on Thursday showed, with researchers expecting to release late-stage trial results by Christmas.

The data, reported in part last month but published in full in The Lancet medical journal on Thursday, suggest that those aged over 70, who are at higher risk of serious illness and death from Covid-19, could build robust immunity...