direct to your inboxThere is 'strong evidence' vaccines will work against the new strains of coronavirus, a top government health expert has said.A mutated variant of Covid-19 emerged in the South East of England earlier this month and is said to behind the recent spike in infections.And two cases of another new strain, which originated in South Africa, have been discovered in the UK it was announced today.But speaking at a Downing Street press conference on Wednesday, infectious diseases expert