Covid 19Covaxin & Covishield Mixing Study Gets Drug Regulator ApprovalTestHostEntryAugust 11, 2021June 7, 2022 by TestHostEntryAugust 11, 2021June 7, 2022 Vellore’s Christian Medical College will conduct its study and clinical trials. A study on mixing Covishield and Covaxin, the two main vaccines used in India’s...