Figure 2.

The total number of SARS-CoV-2 cases averted by vaccination during the course of the epidemic for a vaccine that prevents infection compared with no vaccination, varying with vaccine efficacy, vaccination coverage, R₀, and vaccination onset (percentage of population exposed to SARS-CoV-2) occurring when A) 0% of the population has been exposed, B) 5% of the population has been exposed, C) 15% of the population has been exposed, and D) 30% of the population has been exposed.

Note: Total number of SARS−CoV-2 cases averted is equal to total SARS-CoV-2 cases without vaccination minus total SARS-CoV-2 cases with vaccination. R₀, reproduction number.