Pfizer Covid-19 vaccine reduces transmission after one dose: UK study

A single dose of Pfizer and BioNtech's Covid-19 vaccine cuts the number of asymptomatic infections and could significantly reduce the risk of transmission of the virus, results of a UK study found on Friday.

Researchers analysed results from thousands of Covid-19 tests carried out each week as part of hospital screenings of healthcare staff in Cambridge, eastern England.

"Our findings show a dramatic...