Sir Patrick Vallance, the govt chief scientific adviser, says the thinking behind current approach to #coronavirus is to try and "reduce the peak" and to build up a "degree of herd immunity so that more people are immune to the disease". #R4Today

More: https://t.co/1FmqX3WPh7 pic.twitter.com/pMHknCAobr

— BBC Radio 4 Today (@BBCr4today) March 13, 2020