A UK survey found the number of Kovid-19 infections in adults of all ages fell 65% after the first dose of AstraZeneca or Pfizer vaccine, which scientists say reflects the impact of the national vaccination campaign on the world.
This research was done at a time when a new and more infectious variant of coronovirus, called B1.1.7, was predominant in the United Kingdom, but nevertheless concluded that vaccination was highly effective in younger people Was effective only. People and Healthy.
British Health Minister James Bethel said in a note, “The findings in the real world are extremely promising.” He said the figures showed that the British vaccination program against Kovid-19 – the fastest in the world – had a “significant effect”.
The data come from two studies that are part of the Kovid-19 infection survey – a collaboration between the University of Oxford, the government’s Department of Health and the Office of National Statistics. Both studies were published online, prior to printing, and have not yet been peer reviewed.
The researchers analyzed more than 1.6 million PCR test results from 373,402 study participants between December 1, 2020 and April 3, 2021.
They concluded that 21 days after the first dose of the vaccine, whether from AstraZeneca or Pfizer-Bayonet – without a second dose – the rate of new infection by Kovid-19 dropped 65%. This includes one drop in symptomatic infection of 74% and one drop in infection without symptoms in 57%.
The reduction in common and symptomatic infections was even greater after the second dose – 70% and 90%, respectively – the study concluded, and was similar to the effects in those who had previously experienced a Kovid-19 infection.
The second study looked at the antibody level for the SARS-CoV-2 virus to see how they changed after one dose of each vaccine and two doses of Pfizer. Results showed that antibody responses to single doses of both vaccines were slightly lower in people younger, but higher at all ages after two doses of Pfizer.