An inspection of Napier Barracks in Folkestone and Penally Camp in Wales found residents "depressed" and "hopeless".
Deputy chief medical officer Jonathan Van-Tam said: “It is possible that by combining vaccines, the immune response could be enhanced”.
A study showing the jab cuts transmission rates by 67% could mean lockdown is eased sooner than we thought.
PM says the risk of pupils catching coronavirus is "very small", but Labour and unions point to government failures to help make schools safe.
The latest figures were published on Sunday.
The latest figures were published on Saturday.
US cases pass the 1 million mark and British Airways announces up to 12,000 staff will be made redundant. Here's the latest.
Government officials hold a daily briefing to update on the coronavirus outbreak in the United Kingdom.
A further 589 deaths linked to coronavirus have been recorded in hospitals across England, Scotland and Wales. Here's the latest on Covid-19.