One dose of AstraZeneca vax may cut transmission by two-thirds

New, unpublished research suggests social restrictions could be eased sooner

A single dose of the Oxford/AstraZeneca coronavirus vaccine offers a high level of protection for three months and cuts transmission by two-thirds, according to preliminary results of a new study. 

The analysis of data from three trials found that the first dose conferred on average 76% protection against symptomatic infections from three weeks until 90 days, and reduced transmission of the virus by 67%.

The Oxford University study, published in Preprints with The Lancet, found the

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