👉 Infections refer to the presence of pathogens—such as bacteria, viruses, fungi, or parasites—within a host organism, leading to illness or disease. When a pathogen enters the body, it can multiply and spread, causing damage to tissues and organs. Infections can be acute, lasting for a short period, or chronic, persisting over months or years. Symptoms vary widely depending on the type of infection but often include fever, inflammation, pain, and fatigue. Preventing infections involves hygiene practices, vaccinations, and timely medical treatment. Public health measures, such as quarantine and isolation, are crucial in controlling the spread of infectious diseases. Understanding the mechanisms of infection is vital for developing treatments and vaccines to combat these illnesses.
