18:00Six O'Clock News17/02/2021 World's first Covid exposure trials to take place in the UKBBC Radio 4 Duration: 30 minutes Wed 17th Feb 2021, 18:00 on BBC Radio 4 LWAvailable for over a yearListen nowVolunteers in the UK will be infected with coronavirus to test vaccines and treatments.GenresNewsBrandSix O'Clock News Source: BBC Online