Both the Pfizer and the Moderna vaccines require two (2) doses. The first dose helps the immune system recognize the virus, and the second dose strengthens the body’s response to the virus.
- Pfizer requires two doses, three (3) weeks apart.
- Moderna requires two doses, four (4) weeks apart.
The Pfizer and Moderna vaccines do not work together. That means if you get the Pfizer vaccine first, your second dose must also be Pfizer – you cannot get the Pfizer vaccine first and Moderna vaccine second.
Both Pfizer and Moderna will provide you with a card after your first vaccine that will show you when you need your second dose.