Mixing Covid vaccine doses safe, more effective: Study

A Spanish study on mixing Covid-19 vaccines has found that giving a dose of Pfizer's drug to people who already received a first shot of AstraZeneca vaccine is highly safe and effective, preliminary results showed on Tuesday.

source https://timesofindia.indiatimes.com/world/rest-of-world/spanish-study-finds-astrazeneca-vaccine-followed-by-pfizer-dose-is-safe-and-effective/articleshow/82737671.cms