UK study finds one dose of Pfizer/BioNTech vaccine reduces risk of infection by 72%
By
Tara John, Meera Senthilingam, Niamh Kennedy and Sarah Dean, CNN
Published Feb 23, 2021 1:00:51 AM
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(CNN) New data shows that the first dose of the Pfizer/BioNTech COVID-19 vaccine provides high levels of protection against infection and symptomatic disease, Public Health England (PHE) said in a press release on Monday.
PHE s Siren Study, which was carried out on healthcare workers aged under the age of 65, found that one dose of the vaccine reduced the risk of infection by 72% after three weeks, while two vaccine doses reduced the risk of infection by 85%. This high level of protection extended to the B.1.1.7 coronavirus variant first identified in the UK in December.
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