direct to your inboxThe Brazilian and South African coronavirus variants are of more concern than the UK strain, the UK's chief scientific advisor has warned.Sir Patrick Vallance said fears have been raised that those two variants may be 'less susceptible to vaccines'.Speaking at a Downing Street press conference on Friday afternoon, Sir Vallance said: "We know less about how much more transmissible they are."We are more concerned that they have certain features that they might be less