Can a Vaccinated COVID-19 Patient Contract the Virus Again?
The Pfizer and Moderna vaccines are both mRNA vaccines. These vaccines help our bodies build an immune response to the COVID-19 virus. The mRNA vaccine temporarily teaches our cells how to make a harmless spike protein that is unique to the virus that causes COVID-19. After our cells temporarily make copies of the protein, our immune system recognizes that the protein should not be in our body and builds antibodies to remember how to fight the virus if we are infected in the future.
An antibody is a protein produced by your immune system that can recognize a specific type of virus in your body. When you get exposed, your body’s antibodies are able to recognize proteins on the surface of the COVID-19 virus to attack and stop it from replicating in your body.
For a visual explanation of how mRNA vaccines work, watch Stat’s video “What are mRNA vaccines?”
To learn more, visit CDC’s Understanding How COVID-19 Vaccines Work.
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