Covid-19. Sir Jeremy Farrar, Director of the Wellcome Trust and a member of SAGE, said the coronavirus vaccine is a "remarkable" achievement but warned there was still a long way to go.Writing in the journal Anaesthesia along with Professor Tim Cook, the scientists said the vaccination programme "should not be underestimated."In living memory, "no country has mounted a whole population vaccination campaign" and it will "need to be undertaken with local leadership and cultural sensitivity," Sir Farrar and Prof Cook said.Adding that it would take 80% of the population to be vaccinated for the "prospect of herd immunity."Sir Jeremy and Prof Cook wrote: "The scale of the vaccination programme should not be underestimated: 1,000 vaccination.