UK scientists look at reducing boosters to save vaccine for rest of the world

Scientists in Britain are examining whether smaller doses of Covid vaccine could be used as part of booster programmes, amid hopes that the approach could also increase the supply of jabs across the world. The use of so-called “fractional doses” has been proposed as a way of ensuring that precious supplies can immunise as many people as possible in parts of the world where there are shortages, while still providing high levels of protection from the virus.