AstraZeneca/Oxford vaccine more effective with longer dose gap - study

AstraZeneca and Oxford University's Covid-19 vaccine is more effective when its second dose is given three months after the first, instead of six weeks, a peer-reviewed study published in The Lancet medical journal showed on Friday.

The study confirmed the Anglo-Swedish drugmaker's findings from earlier this month that showed the vaccine had 76 percent efficacy against symptomatic coronavirus infection for three months after the first dose...