Infectious diseases, caused by pathogens such as bacteria, viruses, parasites or fungi. The Infectious diseases can be transmitted, directly or indirectly, from one individual to another. They are innocuous and even supportive, but under certain conditions, they may cause disease. Zoonotic diseases are infectious diseases of animals that can cause disease when transmitted to individuals. Some infectious diseases can be transmitted from individual to individual. Some are transferred by bites from insects or animals. And others are acquired by ingestion of contaminated food or water which is being exposed to organisms in the environment.
Signs and symptoms vary depending on the organism causing the disease; however, often incorporate fever and fatigue. Gentle diseases might react to and home treatment, whereas some serious threatening diseases could need hospitalization. Numerous infectious diseases, such as measles and chickenpox, can be prevented by vaccines. Frequent and thorough hand-washing likewise helps shields us from most infectious diseases.
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