👉 Infections are a critical aspect of human health and disease, representing the invasion of pathogens—such as bacteria, viruses, fungi, or parasites—into the body's tissues or fluids. When these microorganisms breach the body's natural barriers, like the skin or mucous membranes, they can trigger an immune response, leading to infection. Infections can range from mild, such as a cold or a sore throat, to severe and life-threatening conditions like sepsis or pneumonia. Understanding the mechanisms of infection is crucial for developing effective treatments and preventive measures, including antibiotics, antivirals, vaccines, and hygiene practices, which aim to either eliminate the pathogen or bolster the body's defenses against it.
