The Pfizer vaccine could be effective against the 2 most dangerous COVID-19 variants, according to new data

The Pfizer vaccine could be effective against the 2 most dangerous COVID-19 variants, according to new data

  • The Pfizer vaccine triggers a strong response against two prominent COVID-19 variants, per a new study.
  • The variants — first found in the UK and South Africa — led to fears that vaccines might not work on them.
  • The study appears to rebut that theory, but the results are preliminary and not yet peer-reviewed. 
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The Pfizer vaccine could protect against the new variants of the coronavirus, according to data from a new study cited by the Guardian.

The vaccine led to promising results when tested against two variants widely feared by health experts, one first found in the UK, and another first found in South Africa.

The study involved testing the vaccine using blood samples from vaccinated people, rather than studying the effects on the people themselves.

Scientists in Oxford exposed the samples to each of the virus variants. They used samples both from people who had received one dose of vaccine and from people who had taken both.

The data, published here, has not been peer-reviewed, which means experts will likely treat it with caution.

Nonetheless, it showed that after two doses of the vaccine, the immune response was substantial.

William James, an Oxford professor who worked on the data, told the Guardian that the response was “up at the sort of level that neutralizes the virus”

James said that his team is “pretty confident” that those who received two doses of Pfizer vaccine will be protected from infection by the variants, the Guardian said.

James continued: “This virus hasn’t finished evolving, but I think that as long as the vaccines get rolled out, and people get those second doses, we’re going to be in a much better position by the summer than we are now.”

One dose of the vaccine did boost the response to the virus, but not very strongly. 

This suggests that it is “really important” that people get their second dose of the vaccine, Deborah Dunn-Walters, a professor of immunology at the University of Surrey, told The Guardian.

It data is encouraging, but it is likely that more data will be needed to determine whether how the Pfizer vaccine will fare against these new viruses. 

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