LONDON, Feb 15 (Reuters) - There is not yet enough data about how vaccines are affecting the spread of COVID-19, British Prime Minister Boris Johnson said on Monday as he faces pressure from some of his own lawmakers who are keen to ease lockdown measures.
"Although the vaccination programme is going well, we still don't have enough data about the exact effectiveness of the vaccines in reducing the spread of infection," he told a news conference.
(Reporting by Guy Faulconbridge; writing by Costas Pitas; editing by William James)
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