Germs are everywhere – on every surface we touch, on the foods we eat, and everywhere we go. But because they are invisible to the naked eye, we don't think of them until we get aches, chills, sore throats, or other ailments.
Although we may not realize it, we've all been affected by either a bacterium or a virus--these are the germs that make us sick. Bacteria are so small that more than 1,000 of them can fit on the head of a pin. Viruses are even smaller; 10,000 of these can fit on the head of a pin.
In order to keep these germs from harming us, it's important to stay active, eat healthy foods, and get enough rest. In addition, everyone should wash their hands regularly, for example after petting any animals, touching door knobs or pencils. Washing one's hands for 20 seconds with warm water and soap eliminates potentially harmful germs.
Germs are everywhere, and our battle with them may never end; however, with certain precautions, we can at least keep them under control.
[Source: Bill Nye the Science Guy: Great Gig Book of Tiny Germs]