How do we get sick?
Updated February 21, 2017 | Factmonster Staff
![Updated by an Factmonster Editor on February 21, 2017](/themes/ip/images/info-circle.png)
We get sick when we have to fight off viruses or bacteria that have invaded our bodies. A lot of the symptoms we have when we are sick, such as fever, runny noses, coughs and sneezes, are our bodies’ way of getting rid of those nasty little bugs.
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