Pune, Jan 25 Dr Raman Gangakhedkar, former head of epidemiology and communicable diseases at the Indian Council of Medical Research, has discounted the need for the fourth dose of COVID-19 vaccine given the current evidence about the coronavirus and its variants. If a person has taken a third dose of the anti-COVID-19 vaccine, it means his T-cell immune response has been trained thrice, Dr Gangakhedkar said on the sidelines of a function on Tuesday. "The core virus (of COVID-19) has not been changed so much that a new vaccine would be needed, so try and have trust in our T-cell immune response," he said.
