Immunogenicity of Heterologous Versus Homologous Prime Boost Schedule With mRNA and Inactivated COVID-19 Vaccines

Two doses at 21-day +/- 3 days. Each innoculation dose is 0.5 ml containing 600 SU in-house unit (equals to 3μg) of SARS-CoV-2 antigen.

"First dose of Coronavac. Each innoculation dose is 0.5 ml containing 600 SU in-house unit (equals to 3μg) of SARS-CoV-2 antigen.~Second dose of BNT162b2 at 21-day +/- 3 days. Each dose of the Pfizer-BioNTech COVID-19 Vaccine is 0.3 ml. Each prefilled syringe contains 30 mcg of a nucleoside-modified messenger RNA (modRNA) encoding the viral spike (S) glycoprotein of SARS-CoV-2"