England's chief medical officer has warned that it would be "foolish" to expect a coronavirus vaccine in time for Christmas.
But Professor Chris Whitty did say that there was a "reasonable chance" there could be vaccines to the virus before the winter of 2021-2022.
He warned that going into winter there will be "real problems" with Covid-19 and said that the country should plan on the basis of no vaccine being available.
The comments come after Prime Minister Boris Johnson earlier pledged there would be a "significant return to normality" by Christmas.