How does my immune system fight off germs when I get sick?
Invisible Army Boot Camp
How does my immune system fight off germs when I get sick?
You wake up sneezy, achy, and warm — and somewhere inside you, an invisible army is already lacing up its boots. Getting sick feels like your body losing. It's actually your body fighting back, with one of the most spectacular defense systems on Earth.
First, meet the troublemakers. Germs are tiny living things — bacteria and viruses — far too small to see. A virus can't even live on its own. It sneaks into one of your cells and tricks it into making thousands of copies of the virus, like a photocopier gone rogue. That's how a few germs become an invasion.
