How effective is the COVID-19 vaccine?
Since March 2020, South Africa has experienced four different COVID-19 pandemics, each with a different circulating SARS-CoV-2 variant(There are two main types of variants, Beta (B.1.351) or Delta (B.1.617.2)). South Africa has the eighth-highest number of deaths globally from COVID-19, vaccine supplies have been low, and healthcare workers have been severely affected by their proximity to patient...