Mixing Covid-19 vaccine doses safe but increases side effects: Study

Mixing the doses of different types of two-dose coronavirus vaccines has been found to be safe but increased the frequency of mild to moderate symptoms, a new UK study has found.

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/BioNTech jab, and vice versa, since February.

In its report for the medical journal Lancet on Wednesday, the research team said adverse reactions from this mix and match approach were short-lived and there were no other safety concerns.

The findings at this stage are limited