The needle-free ZyCoV-D vaccine, manufactured by Zydus Cadila, has received emergency use authorisation for being administered to children between 12 and 17 years of age in India. The three-dose vaccine is to be given with a 28-day gap between each dose.The needle-free ZyCoV-D vaccine, manufactured by Zydus Cadila, has received emergency use authorisation for being administered to children between 12 and 17 years of age in India. The three-dose vaccine is to be given with a 28-day gap between each dose.