AstraZeneca coronavirus vaccine 'up to 90% effective'

AstraZeneca on Monday became the third pharmaceutical company to announce positive results from late-stage trials of a coronavirus vaccine, saying that its candidate, developed by Oxford University, is up to 90% effective.

Scientists and politicians alike hailed the third straight week of buoyant scientific news as a sign that, even as coronavirus cases surge to devastating levels in many countries, an end to the pandemic is in sight.