PM Narendra Modi announced on Saturday that “precaution doses” (boosters) of Covid vaccines for health and frontline workers as well as for those above 60 with co-morbidities will begin from January 10. He also said vaccination for children aged 15-18, using Covaxin, will begin from January 3. Modi also said approvals for a nasal vaccine and the world’s first DNA vaccine are on the anvil.