The Valneva jab, which will be made in Scotland, produces a “strong immune response” to coronavirus, Health Secretary Matt Hancock said. Stage one and two trials found the jab produced antibodies to fight against COVID-19 in 90 percent of volunteers.
The UK has ordered 100 million doses of the vaccine which is created by Valneva, a French biotec firm.
The company said the results showed the vaccine was “highly immunogenic with more than 90 percent of all study participants developing significant levels of antibodies” to the COVID-19 virus spike protein.
The data suggested the jab also induced T-cell responses, which can help the body fend off a virus and play a role in long-lasting immunity.
The Valnerva jab has taken a different scientific approach to the vaccines already approved.
Scientists have used a whole inactivated virus in the process, which aims to teach the immune system about many parts of the virus.
Vaccines, such as AstraZeneca and Pfizer, are made to produce an elicit immune response to a spike protein of COVID-19.
The phase one and study involved 153 participants and will now move on to a phase three clinical trial.
Prime Minister Boris Johnson said the findings were “very promising news”.
He added the jab would provide a “crucial weapon” against coronavirus if it is approved by the Medicines and Healthcare products Regulatory Agency (MHRA).
Mr Hancock described the results of the trial as “fantastic” and confirmed it will be made at a lab in Livingston.
A domestically manufactured vaccine would likely help to ease any future problems and reliance on supplies from the continent.
The Health Secretary said: “The UK Government has funded these clinical trials and it is fantastic to see Valneva’s vaccine produces a strong immune response.
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Earlier today, Boris Johnson insisted he will not deviate from his roadmap out of lockdown, despite a warning from scientific advisers.
The Scientific Pandemic Influenza Group on Modelling produced a paper dated March 31 showing an increase in hospital admissions and fatalities is “highly likely” during the later stages of removing restrictions.
Mr Johnson said the Government will continue to look closely at the data ahead of opening up society further on May 17 and finally June 21.
But he added: “At the moment, as I look at all the data, I can’t see any reason for us to deviate from the road map that we have set out, we are sticking to it.”