Mixing COVID-19 vaccines gives good protection: Study

Amid the global shortage of the COVID-19 vaccines, a study conducted by Oxford University has found out that alternating doses of the AstraZeneca and Pfizer-BioNTech vaccines generate robust immune......

Higher Omicron infection risk despite full vax: Study

Two doses of Pfizer and AstraZeneca COVID-19 vaccines generate lower levels of antibodies against the Omicron variant of coronavirus, according to a study which suggests that those previously......