CDC indicates that With both COVID-19 mRNA vaccines, you will need 2 shots to get the most protection. The timing between your first and second shot depends on which vaccine you received.
- Pfizer-BioNTech doses should be given 3 weeks (21 days) apart
- Moderna doses should be given 1 month (28 days) apart
You should get your second shot as close to the recommended 3-week or 1-month interval as possible. However, your second dose may be given up to 6 weeks (42 days) after the first dose, if necessary. You should not get the second dose earlier than the recommended interval.