The Drugs Controller General of India (DCGI) has given the approval to conduct a study on the mixing of Covishield and Covaxin vaccines. The step has been taken to boost the mass vaccination drive against the coronavirus across the nation.

The DCGI has said that the study and its clinical trials will be conducted by Christian Medical College in Vellore.

The study aims to find out whether a person can be given two different vaccine shots — one each of Covishield and Covaxin — to be fully vaccinated against the coronavirus disease, instead of the existing practice of administering twin shots of the same vaccine.

A Subject Expert Committee of the Central Drugs Standard Control Organisation (CDSCO) on July 29, recommended conducting this study on the mixing of the two shots.

The expert committee recommended granting permission to CMC, Vellore, for conducting the Phase-4 clinical trial which may conduct the study on 300 healthy volunteers by administering a dose of each of Covaxin and Covishield.

However, the DCGI’s approval for the study on mixing the vaccines is different from the recent study of the Indian Council of Medical Research (ICMR) which concluded that combining two different shots is “safe and effective”.

The ICMR had analyzed an “accidental” mixing of Covishield and Covaxin.

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