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It is impossible for most vaccines to give you the disease. This is because they use only parts or dead bacteria or virus to make vaccine. This is how we make hepatitis B, flu, and polio vaccine to name a few. COVID-19 vaccine also can’t give you the disease. It uses mRNA which teaches your cells to make a part of the virus so it can learn to defend against it. The mRNA quickly degrades in the cell leaving just the protection your body made!

A few vaccines do use weakened versions of the virus and could cause the disease. But it is rare. If it does happen, the disease is much less severe than getting infected otherwise. MMR and varicella are 2 examples of this vaccine type.