The World Health Organisation's (WHO) vaccine advisory group has recommended that immunocompromised people should have an additional dose of all Covid-19 vaccines authorised by the WHO, reports AFP.

“Moderately and severely immunocompromised persons should be offered an additional dose ... since these individuals are less likely to respond adequately to vaccination following a standard primary vaccine series and are at high risk of severe Covid-19 disease,” the UN health agency's Strategic Advisory Group of Experts on Immunisation said.