The Centre has given green signal to Russia-made Sputnik Light as a third precautionary dose and it will soon be available at private vaccination centres throughout the country. More than 6.5 lakh people who have received Sputnik COVID vaccine will soon be eligible to take the booster dose. India had earlier approved a third dose of COVID vaccines – Covaxin and Covishield – for adults. Earlier, the NTAGI had recommended that the first dose of the Russian COVID-19 jab could be administered as a precautionary dose. The two doses of Sputnik V vaccine have different compositions. The first dose of the vaccine contains a recombinant adenovirus type 26 (rAd26-S) and the second dose a recombinant adenovirus 5 (rAd5-S), an official explained. As of now, there is no policy decision on providing a precautionary dose to those inoculated with the Russian vaccine. The NTAGI’s Standing Technical Sub-Committee (STSC), which held its meeting , discussed the issue and recommended that the first dose of Sputnik V can be given as the precaution dose to all those vaccinated with the Russian jab,” a source.