Infectious Agents

Infectious agents are microorganisms that can cause disease in humans, animals, and plants. These include bacteria, viruses, fungi, and parasites. They invade the body, reproduce, and can lead to illnesses like colds, flu, or more serious conditions. Transmission occurs through contact with infected individuals, contaminated surfaces, food, water, or vectors like insects. Understanding infectious agents helps in preventing and controlling illnesses through hygiene, vaccination, and other health measures.