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.
Several members of the Joint Committee on Vaccination and Immunisation (JCVI), which advises the UK government, are said to be interested in the idea. Lower doses of vaccines to tackle other diseases have been used in times of shortage.
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