which is the best vaccine for covid 19 ? Sputnik V, Covishield, Covaxin: What we know about India's Covid-19 vaccines from WHAT BBC TELLS US?
Sputnik V : The vaccine, developed by Moscow's Gamaleya Institute, initially generated some controversy after being rolled out before the final trial data had been released. But scientists say its benefits have now been demonstrated. It uses a cold-type virus, engineered to be harmless, as a carrier to deliver a small fragment of the coronavirus to the body. Safely exposing the body to a part of the virus's genetic code in this way allows it to know the threat and learn to fight it off, without the risk of becoming ill. After being vaccinated, the body starts to produce antibodies especially tailored to the coronavirus. This means that the immune system is primed to fight coronavirus when it encounters it for real. Second dose : Unlike other similar vaccines, the Sputnik jab uses two slightly different versions of the vaccine for the first and the second dose - given 21 days apart. They both target the coronavirus's distinctive "spike", but use different vect...
