The Medicines and Healthcare products Regulatory Agency (MHRA) approved the Evusheld treatment on Wednesday.
Developed by AstraZeneca, Evusheld combines two acting antibodies and was found to be 77 per cent effective in reducing the risk of symptomatic Covid. Protection also lasts for at least six months following a single dose.
While for many, a vaccine is the most effective way of combating the virus, Evusheld has been developed for those who are unable to form a strong immune response to coronavirus.
Dr June Raine, MHRA Chief Executive said: “After a careful review of the data, I am pleased to confirm that we have authorised another medicine to help protect against the effects of Covid-19.
“Evusheld is a ‘pre-exposure prophylaxis’ treatment, meaning it is taken to prevent Covid-19 before the risk of acquiring infection.
“One dose has been found to provide long-lasting protection against this disease for up to six months.”
Dr Raine said that while vaccines continued to be the best protection against Covid, some people do not respond to them or cannot take them.
“For these people, Evusheld could provide effective protection against Covid-19,” she said.
It is unclear if the treatment is effective against the Omicron variant.
Meanwhile, Health Secretary Sajid Javid has suggested that another booster of the coronavirus vaccine could be rolled out in the autumn.
Mr Javid said he expected experts to recommend an extra dose of the jab and suggested the jabs would be offered before the end of the year.
Speaking on ITV’s Peston programme, he said: “When it comes to vaccinations I think we rightly take the advice of our clinicians.
“There’s a committee, it’s called the JCVI and we listen very carefully to what they’ve got to say.
“They look at the data very, very carefully and their latest advice as you say is that there should be a second boost – or let’s call it a fourth dose – but to focus on those over 75, those in care homes, those who are immunosuppressed.
“Now we will start that by the end of this month, that’s what we’ve said and we’re completely on track for that. But we listen to their advice all the time, should they come forward…”
But when pushed as to whether this would be widened to the general population – not just those who are considered vulnerable, he said: “I think at some point they will and they’ve actually been clear, and their most recent advice is that they think that towards the end of this year, maybe in the autumn, there will be a need to give a lot more people a boost, an offer of a boost, but I’ll wait for that advice.”
Last month Mr Javid said people in specific groups will receive a further dose in the coming weeks to help those at the highest risk of serious illness maintain a high level of protection against the virus.
Health services across the UK will offer people the jab from about six months after their last dose.
As of Wednesday, the Government said 516,289 had tested positive for Covid in the last seven days, a rise of 170,230 from the previous seven days.
In the same time period, 744 had died within 28 days of a positive test, this was down by 34.
The number of people in hospital with Covid over the last seven days had also risen, to 11,047, up by 1,912.