The younger vaccinated group — health care workers under 65 — showed a 72 percent protection against infection with a single dose, rising to 85 percent after the second dose.
“Reducing the people with infection, both symptomatic and asymptomatic, is the biggest thing that will reduce transmission,” said Susan Hopkins, strategic response director to Public Health England.
The study will also follow up contacts of health care workers to see if any become positive.
The data published by Public Health England looks only at the BioNTech/Pfizer vaccine, since this has been distributed the longest.
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