Health | The Daily Star
How to know if the COVID-19 vaccine is working?
Health

How to know if the COVID-19 vaccine is working?

To understand how COVID-19 vaccines work, it helps to first look at how our bodies fight illness. When germs, such as the virus that causes COVID-19, invade our bodies, they attack and multiply. This invasion, called an infection, is what causes illness. Our immune system uses several tools to fight infection.

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