AstraZeneca boss: We think we’ve figured out winning formula for COVID vaccine

The government has ordered 100 million doses of the vaccine, with around 40 million expected to be available by the end of March.

The pharmaceutical boss behind the Oxford vaccine says researchers have found a “winning formula” to improve the jab’s efficacy.

Trials of the vaccine, developed by the university along with AstraZeneca, showed an efficacy rate of 90% when people were given half a dose followed by a whole dose at least a month later.

When two full doses were given at least a month apart, the vaccine had an efficacy of 62%, meaning that – when all the results were taken into account, the overall efficacy was 70%.

The Pfizer and Moderna vaccines were shown to be 95% and 94.5% effective respectively.

But Pascal Soriot, chief executive of AstraZeneca, told the Sunday Times: “We think we have figured out the winning formula and how to get efficacy that, after two doses, is up there with everybody else.