BA.5, Omicron sub-variants, Variant of concern, COVID-19, SARS-CoV-2, hACE2.Tg mice, re-infection
SARS-CoV-2, Cell mediated immunity, COVID-19, T-cell mediated immunity, IFN-γ response
SARS-CoV-2; covid vaccine; COVID-19; covaxin; BBV152