» » » U.K. expands COVID-19 mix and match vaccine trial

The Com-Cov study, led by the University of Oxford, has been investigating the immune responses of volunteers given a dose of the Oxford/AstraZeneca vaccine followed by the Pfizer jab, and vice-versa, since February.

https://ift.tt/eA8V8J< April 14, 2021 at 02:56PM> from The Hindu - International https://ift.tt/3dgqFFF

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