Disease
About Disease
Disease begins with tiny creatures invading bodies. These microbes live in air, water, soil, on skin, and inside organs. Some microbes support digestion and clean waste. Other microbes attack cells and trigger fever or pain.
Bacteria form a group of single-celled organisms. They drive processes like food digestion and waste breakdown. Some bacterial strains spark infections in organs. Viruses hijack cells to make more viruses. They lead to symptoms such as cough and rash. Fungi break down dead matter and produce medicines. Other fungi invade skin layers and cause itching. Parasites survive by feeding on hosts. Their presence disrupts normal functions.
Testing water and checking surfaces catch germs before they spread. Washing hands removes contaminants from skin. Vaccines train immune cells to fight specific invaders. Clean air filters stop particles from circulating indoors. Proper food storage stops bacteria from multiplying. Each simple step builds a layer of defense against disease.