Sri Lankan authorities have begun to roll out Covid-19 booster shots to frontline workers as the South Asian nation’s top medical association warned of a possible virus surge.

Pfizer booster jabs will be given initially to workers in the health, security and travel sectors, before including those above 60 years of age, the health ministry has said.

About 62 per cent of Sri Lanka’s 22 million people have been fully vaccinated, according to the ministry’s statistics.