The content originally appeared on: CNN (CNN)China has become the first country to green-light an inhaled Covid-19 vaccine, paving the way for potential use of the needle-free product in the country, where suppressing the spread of Covid-19 remains a top priority. The vaccine maker, CanSino Biologics, said in a statement Sunday that China's medicines regulator had approved the inhaled dose for emergency use as a booster vaccine. The product, known as Convidecia Air, delivers a vaccine dose through a puff […]