Prof Sir Andrew Pollard told MPs that efforts were still needed to reach millions of people who have not had first doses. He said the disease is not going away and they will eventually "meet the virus". Giving evidence to the Commons science and technology committee, he said: "If they're not vaccinated, those susceptible will end up in intensive care. It just might not be today, it might be next year.That's why I think we still have to focus on persuading those individuals."