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One COVID vaccine dose yields good protection in elderly, 2 studies find
As COVID-19 vaccines were first being approved for emergency use in the United Kingdom, the UK Joint Committee on Vaccination and Immunisation decided to extend the interval before the second dose from 4 to 12 weeks to maximize the amount of people who could be vaccinated. This week, two Lancet Infectious Diseases studies estimated vaccine effectiveness (VE) for the elderly after receiving just one dose.