Amid a raging debate over the interval between two Covishied doses, Covid Working Group chief NK Arora has said that India will revisit the dosage interval for the vaccine and take appropriate action based on emerging data.
The head of the National Technical Advisory Group on Immunisation has said that according to research in India, a single shot had up to 61% effectiveness against the Delta strain.
In the short run, the protection from serious disease, hospitalisation, and death is similar whether one has received one dose or two doses of Covishield and Covaxin, Dr Arora said.
"Studies show that breakthrough infection with one dose is around 4 per cent, and around 5 per cent with two doses, basically hardly any difference," Dr Arora added.