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Public health england estimates that nearly 85,000 deaths have been prevented as a result of the covid—19 vaccination programme in england so far. however, the study�*s lead investigator said vaccine efficacy could drop to 50% by the winter and boosters would be needed. it is bringing into focus this need for some action. we can�*tjust sit by and see the protectiveness slowly waning while cases are still high and a chance of infection is still high as well. the government has said there will be boosterjabs sometime in september, starting with those most at risk of severe covid—19. soph...

Sophie hutchinson, reports. just how long vaccines offer protection and whether we need boosters is a crucial question ahead of the winter. today's study adds to growing evidence that, over time, covid vaccines become less effective at stopping infections. it examined 1.2 million positive test results between may and july this year and found that protection from the pfizer vaccine seemed to reduce from 88% to 74% over 5—6 months, and astrazeneca from 77% to 67% over 4—5 months. importantly, this is about preventing a covid infection. hospital figures suggest that both vaccines have continu...

Public health england estimates that nearly 85,000 deaths have been prevented as a result of the covid—19 vaccination programme in england so far. however, the study�*s lead investigator said vaccine efficacy could drop to 50% by the winter and boosters would be needed. it is bringing into focus this need for some action. we can'tjust sit by and see the protectiveness slowly waning while cases are still high and a chance of infection is still high as well. the government has said there will be boosterjabs sometime in september, starting with those most at risk of severe covid—19. sophie ...

Prevented as a result of the covid—19 vaccination programme in england so far. however, the study�*s lead investigator said vaccine efficacy could drop to 50% by the winter and boosters would be needed. it's bringing into focus this need for some action. we can'tjust sit by and see the protectiveness slowly waning while cases are still high and a chance of infection is still high as well. the government has said there will be boosterjabs sometime in september, starting with those most at risk of severe covid—19. sophie hutchinson, bbc news. we are going to talk a bit more to professor ti...

At stopping infections. it examined 1.2 million positive test results between may and july this year and found that protection from the pfizer vaccine seemed to reduce from 88% to 74% over 5—6 months, and astrazeneca from 77% to 67% over 4—5 months. importantly, this is about preventing a covid infection. hospital figures suggest that both vaccines have continued to protect against severe illness in many people. public health england estimates that nearly 85,000 deaths have been prevented as a result of the covid—19 vaccination programme in england so far. however, the study�*s lead in...