Why are two shots necessary?

The Pfizer and Moderna vaccines require two shots a set number of days apart. You need two doses to build up strong immunity against COVID. The second shot will come about 3-4 weeks after the first. It is important to get two doses of the same vaccine.

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1. How do I get the vaccine?
2. When can I receive the vaccine?
3. How much is the vaccine?
4. Should I have my child vaccinated?
5. Is the vaccine safe?
6. Are there any side effects from the vaccine?
7. Why are two shots necessary?
8. How do I know when to get the second shot?
9. Is vaccination required?