When this happens, our immune system gets weaker too. The
germs that haven't been destroyed multiply and spread quickly
throughout our bodies."
"So, when this happens, do the germs take over our whole bod-
ies?" they asked.
"No," he continued. "In that case, our immune system starts an
even bigger war against the germs. Because of this big war that is
going in on our bodies, we get a fever, we feel out of sorts and
our joints begin to ache."
The students nodded. "Yes. When that happens we have to stay
in bed."
"Of course, when that happens the best thing we can do is rest.
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