The trials which started in January plans to speed up race to get a Covid vaccine, and the govt. spends £33.6m for the ground-breaking work.
The top priority is set to be safety, expert insist.The plans will need ethical approval and sign off from regulators before they can go ahead.
Human challenge studies provide a more quicker way to test vaccines because you don’t have to wait for people to be exposed to an illness naturally.
Researchers would first use controlled doses of the pandemic virus to discover what is the smallest amount that can cause Covid infection in volunteers aged 18 to 30.
These human guinea pigs, who will be infected with the virus through the nose and monitored around the clock, have the lowest risk of harm due to their young age and good health and scientists could test if a Covid vaccine prevents infection.
INPUTS: BBC NEWS