Oxford University is leading the race for a coronavirus vaccine. But ministers have been warned about the chances of a successful jab ever emerging.
The Sunday Times reported that a source involved in the search for a vaccine told ministers: “There is around a one in three chance that we get a vaccine at all.”
The warning comes as Boris Johnson is battling to reopen schools in September.
The Prime Minister is under pressure to shut pubs, restaurants and shops ahead of schools in the event of coronavirus flare-ups.
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Ministers have been warned of a one in three chance there will never be a coronavirus vaccine
8am update: New Zealand marks 100 days without domestic coronavirus case
New Zealand has marked 100 days without community transmission of coronavirus but the country’s health chief warned against complacency.
Director-General of Health Dr Ashley Bloomfield said: "Achieving 100 days without community transmission is a significant milestone, however, as we all know, we can't afford to be complacent.
"We have seen overseas how quickly the virus can re-emerge and spread in places where it was previously under control, and we need to be prepared to quickly stamp out any future cases in New Zealand.”
7.45am update: Johnson says ‘moral duty’ to get all children back to school
Boris Johnson has spoken of a “moral duty” to get all children back to school in September.
Writing in the Mail on Sunday, the Prime Minister said it is the "national priority" to get all pupils back into classrooms next month.
He said: "This pandemic isn't over, and the last thing any of us can afford to do is become complacent.
"But now that we know enough to reopen schools to all pupils safely, we have a moral duty to do so."
He warned of the "spiralling economic costs" of parents and carers being unable to work, adding: "Keeping our schools closed a moment longer than absolutely necessary is socially intolerable, economically unsustainable and morally indefensible."
7.30am update: PM to ‘head to Scotland’ for staycation
Boris Johnson is reportedly taking a two-week staycation in Scotland.
The Sunday Times reported the Prime Minister, fiancee Carrie Symonds and their son Wilfred would travel north of the border next weekend for a family holiday.
A Downing Street source declined to comment but did not deny the report.
Speaking last month, Mr Johnson said: "I would encourage people still to think of wonderful staycations here in the UK.
"There are all sorts of fantastic destinations, the best in the world, I would say.”