India gets first COVID-19 nasal vaccine. Why it could reduce infection, stop transmission

India’s first intra-nasal vaccine – delivered through the nose instead of a shot in the arm – has received approval from the country’s apex drug regulator for emergency use in adults. The vaccine, which has been developed by Bharat Biotech with technology in-licensed from Washington University-St Louis, has been approved for primary immunisation, meaning it can be given to the unimmunised to protect against COVID-19.