A latest study has found that both vaccines, Covishield and Covaxin elicited good immune response after two doses, although seropositivity rates and median anti-spike antibody titre was significantly higher in Covishield as compared to Covaxin.

The study is titled, Antibody Response after Second-dose of ChAdOx1-nCOV (CovishieldTM) and BBV-152 (CovaxinTM) among Health Care Workers in India: Final Results of Cross-sectional Coronavirus Vaccine-induced Antibody Titre (COVAT) study published in MedRxiv.