AstraZeneca’s Covid-19 vaccine shows average efficacy of 70%

The coronavirus vaccine

The coronavirus vaccine developed by the University of Oxford and drug maker AstraZeneca has shown an average efficacy 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 efficacy of up to 90 percent, while the Pfizer vaccine is 95-percent effective and Russia’s Sputnik V is 92-percent effective.

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