If an employee receives dose 1 of the vaccine on clinic 1 and they miss clinic 2, can they still receive dose 2 during clinic 3? What does this mean in terms of the efficacy of the vaccine?

According to the CDC, the second dose should be administered as close to the recommended interval as possible. However, if it is not feasible to adhere to the recommended interval and a delay in vaccination is unavoidable, the second dose of Pfizer-BioNTech and Moderna COVID-19 vaccines may be administered up to 6 weeks (42 days) after the first dose. There are currently limited data on the efficacy of mRNA COVID-19 vaccines administered beyond this window. If the second dose is administered beyond these intervals, there is no need to restart the series.