viruses

Viruses are tiny germs that can make us feel sick. They like to live inside our bodies and other living things, like animals and plants. They are so small that we can't see them with our eyes, but we can see the effects they can have. Viruses enter our bodies and multiply inside us. They make us feel tired, have a fever, a runny nose, a sore throat, and sometimes even a stomachache. To make things better, we can take medicine and rest.