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Representative image MUMBAI: India may have decided to stick to the 28-day gap between two shots of Covishield, but there is growing evidence that a gap of almost three months would be better. In a study published in the Lancet, researchers from the University of Oxford, where Covishield was developed, said a 3-month interval between the doses results in a higher vaccine efficacy than a six-week interval, reports Malathy Iyer. The first dose offers 76% protection for up to 3 months, said the study. Many local doctors, too, had raised the “better antibody levels with longer gap” theory with the Centre. “We believe a gap of two months should be provided between the two shots,” said Dr Shashank Joshi, who is a member of the Maharashtra Covid task force.

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