Switzerland has authorised booster shots of Covid-19 vaccines for the over-65s, as it urges those with no protection at all to get immunised, reports AFP.

The Swissmedic regulatory authority said the booster would be one shot of the Pfizer-BioNTech vaccine, or a half-dose of Moderna.

“People at especially high risk can receive a booster dose of a vaccine in order to remain adequately protected against severe episodes of Covid-19,” the agency said.