A study from Oxford University, which shows that cross vaccination between vaccines from different pharmaceutical companies in the fight against Covid-19 can boost immunity.

According to the researchers, the study involved more than a thousand volunteers.

Basically this study states that receiving one dose of a particular vaccine and receiving another dose from a different pharmaceutical company is more beneficial than receiving two doses from the same brand.

"The vaccine that offers the best results as a second dose is Moderna's," the study concludes.