Updated: 23 Jan 2021, 12:12
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BRITAIN s Chief Scientific Adviser Sir Patrick Vallance insisted it s too early to be concerned about Israeli data that suggested
one dose of the Pfizer vaccine is only 33 per cent effective.
The Israeli findings sparked concern about Britain s decision to push back delivery of a second dose from three weeks to 12 weeks.
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Sir Patrick Vallance has insisted Israeli data suggesting on one dose of the Pfizer vaccine being only 33 per cent effective is prelinimary Credit: PA:Press Association
Nachman Ash, Israel s vaccine tsar, said a single dose appeared less effective than we had thought .
An Israeli study of 200,000 over-60s found the first dose led to a 33 per cent drop in cases between 14 and 21 days afterwards.