The Vaccine Works Fast

From the FDA report : Two doses is great but one dose already looks good even though sample is small. “ Efficacy against severe COVID-19 occurring after the first dose was 88.9%.” Based on the number of cases accumulated after Dose 1 and before Dose 2, there does seem to be some protection against COVID-19 disease following one dose; however, these data do not provide information about longer term protection beyond 21 days after a single dose.

Source: The Vaccine Works Fast