Infection
Infectious diseases are diseases caused by microorganism —such as bacteria, fungi, viruses or parasites. The microorganism enters a person's body and causes harm. Many organisms live in our body, and most of them are harmless or even helpful. The microorganism uses the human body to sustain itself, reproduce and colonize. These infectious microscopic organisms multiply quickly. They can spread by different ways, including: skin contact, transfer of bodily fluids, contact with feces, ingesting contaminated food/water, etcetera. Signs and symptoms vary depending on the organism that caused the infection, but often include fever and fatigue. Mild infections may respond to rest and home remedies, while some life-threatening infections may need hospitalization. Many infectious diseases can be prevented by vaccines. Frequent and thorough hand-washing also helps protect you from most infectious diseases. Bacteria, viruses, parasites and fungi vary in several ways: size, shape, fun...