Key paragraph below. My question is what the baseline infection rate is for unvaccinated people. If it's much higher than 3.3 per 1,000 then there's less of a

Key paragraph below. My question is what the baseline infection rate is for unvaccinated people. If it's much higher than 3.3 per 1,000 then there's less of a case for getting a booster. > Among individuals 60 years or older who were fully vaccinated last January, the number of confirmed breakthrough infections was 3.3 per 1,000 people during the three weeks of the study. Those who were vaccinated in February and March had lower infection rates of 2.2 per 1,000 and 1.7 per 1,000, respectively. The data revealed a similar pattern in those aged 40 to 59 and those aged 16 to 39.