Do you have questions about how viral vector vaccines work to teach your body how to fight COVID-19?

The virus that causes COVID-19 has proteins, called “spike proteins,” on its surface. When you get a viral vector COVID-19 vaccine, a harmless version of a different virus called a “vector” carries a message to your body that tells it how to make spike proteins. Your body’s immune system makes antibodies that help fight off the virus, so you don’t get sick.

If you are exposed to with the virus that causes COVID-19, your body sees these proteins and tells your immune system to respond and fight the virus.

Remember, when your body responds to the vaccine, it can sometimes feel like a viral infection. You may have tiredness, headache, muscle pain, chills, fever, or nausea. This are normal signs that your body is building protection.

COVID-19 vaccines are an important tool to stop this pandemic. Learn more about viral vector vaccines and how they help protect you against COVID-19:

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