Germs are microscopic creatures. These include bacteria and viruses. Harmful bacteria cause infections like sore throats and stomach aches. Viruses are germs that can cause chickenpox, measles and influenza. We catch germs from people who are unwell, from stale and unhygienic food or water, or from our surroundings. They produce poisons that make us sick. Some of these diseases, like cholera, tuberculosis and HIV/AIDS can even kill us.So always wash your hands before you eat anything with them.