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[Mymani]

New Delhi: The Oxford University's Covishield vaccine for coronavirus has drawn an immune response even in the elderly, who are among the groups vulnerable to the disease, Adar Poonawala, the chief of Serum Institute of India, which is partnering the UK-based premier university, told NDTV today. The vaccine, he said, is "very safe". "Thousands of people have had it in India and abroad so we are cracking on track with no safety concerns," he added.
"It does give an immune response which is good news. You know we were always fearful that whether it will protect the elderly as well, that was our concern. So, you know it will give a slightly different response but it seems at the moment we're going to get a response both in the young and healthy, and the elderly," Mr

While underscoring the safety of the vaccine, Mr Poonawalla however, said it would take time, nearly around two years, to come to a conclusion about its efficacy.

"It's only after a year or two that we see vaccinated patients or people whatever, be protected when they are exposed to the virus that we will know the vaccine has given you that long term immunity," he told NDTV.