Following Israel, the United Kingdom has also released the “practical” effectiveness data of Pfizer & BioNTech vaccine. The data released by the two countries are very close. In Israel, the effective rate of two injections of Pfizer vaccine is 89%, and in the United Kingdom, the effective rate of two injections of Pfizer vaccine is 88%. On Monday, local time, the United Kingdom released preliminary data on three vaccine effectiveness studies: an analysis of the effectiveness of vaccination among the elderly, medical staff and more than 5 million people in Scotland. These data have not been reviewed by other scientists.
According to the Public Health Agency of England, compared with the situation without the vaccine, people aged 80 and over received a dose of Pfizer & BioNTech vaccine and the number of new crown cases decreased by 57%. This figure includes mild cases. British Chief Medical Officer Chris Whitty said that analysis shows that after the first dose of vaccine, severe cases can be reduced by approximately 75%.
After the second dose of the vaccine, the number of new crown cases has been reduced by 88%. The United Kingdom has chosen to extend the interval between two injections of the vaccine and prioritize the allocation of limited vaccines to the first injection group in order to expand the range of people protected by the vaccine. David Strain, a lecturer at the University of Exeter School of Medicine, said Monday’s data showed that the second injection is very important and can significantly improve the effectiveness of the vaccine.
Another analysis of medical staff showed that three weeks after the first shot of Pfizer & BioNTech vaccine, the new crown infection rate dropped by 72%, and after the second shot, the new crown infection rate dropped by 86%.
Earlier Monday, researchers in Scotland also published a preliminary analysis of 5.4 million health records. They found that one month after the first injection of the Pfizer & BioNTech vaccine, the number of COVID-19 cases was reduced by 85%; after a single dose of AstraZeneca vaccine, the number of COVID-19 hospitalizations was reduced by 94%.