New Delhi, April 06, 2021.

Serum Institute of India CEO Adar Poonawalla has said that the effectiveness of the Covishield vaccine rises to as much as 90 per cent if the two shots are separated by about 2.5-3 months.

One arm of trials, in which doses were given one month apart, was 60-70 per cent effective. And there was another group of few thousand patients where they gave a gap of 2-3 months between the two doses. That is where they found the efficacy to be 90 percent.

Adar Poonawalla said that immunity kicks in one month after taking the first dose of the Covishield vaccine. The vaccine works by using a weakened version of a common cold chimpanzee adenovirus.

We found an excellent response below the age of 50 with one dose. We can say after a month, even with one dose, there is excellent protection, more than even what you find in a Covid-19 recovered patient. About 70 per cent of people are fully protected with one dose, but the second dose is necessary for long-term immunity protection,” he said.