The coronavirus vaccine developed by the University of Oxford and drug maker AstraZeneca has shown an average efficiency of 70 percent, depending on dosage, the partners said as they announced clinical trial results.

The developers revealed the preliminary results on Monday, following trials conducted in the UK and Brazil. Depending on the dosage, the vaccine showed varying efficiency of up to 90 percent, while the Pfizer vaccine is 95 percent effective and Russia’s Sputnik V is 92 percent effective.

“One dosing regimen showed vaccine efficacy of 90 percent when AZD1222 was given as a half dose, followed by a full dose at least one month apart, and another dosing regimen showed 62 percent efficacy when given as two full doses at least one month apart,” the AstraZeneca developers said in a statement, adding, “analysis from both dosing regimens resulted in an average efficacy of 70 percent.”

AstraZeneca’s CEO Pascal Soriot said the vaccine’s “efficacy and safety” showed it will be highly effective against the coronavirus and it will have an “immediate impact” on the Covid-19 crisis.

The announcement was welcomed by UK Health Secretary Matt Hancock who said the preliminary trial results were “fantastic news.”

“These figures … shows that the vaccine in the right dosage can be up to 90 percent effective,” he told Sky News. “We’ve got 100 million doses on order and should all that go well, the bulk of the rollout will be in the new year.”

The pilot vaccination program is expected to begin next month, Hancock added, expressing hope that “sometime after Easter things will be able to start to get back to normal.”

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