human infections

Human infections occur when harmful bacteria, viruses, fungi, or parasites enter the body and multiply, causing illness. These pathogens can be transmitted through contact with contaminated surfaces, food, water, or infected individuals, as well as through air or insect bites. Common examples include colds, the flu, or infections from bacteria like Salmonella. Our immune system fights these invaders, but sometimes infections can lead to symptoms like fever, fatigue, or pain. Preventive measures include good hygiene, vaccination, safe food practices, and avoiding contact with infected persons or environments. Prompt treatment helps resolve infections and reduces spread.