👉 Infection refers to the invasion and multiplication of pathogens—such as bacteria, viruses, fungi, or parasites—within a host's body, leading to disease. This process begins when these microorganisms enter the body through various routes like ingestion, inhalation, or skin contact. Once inside, they can colonize tissues, evade the immune system, and multiply, often triggering an immune response. If the infection is severe or the host's defenses are weakened, it can result in symptoms ranging from mild discomfort to life-threatening conditions. Understanding infection involves recognizing the mechanisms of pathogen entry, survival, and replication, as well as the body's defense strategies, including the immune system's role in identifying and neutralizing these invaders. Effective prevention and treatment strategies focus on reducing exposure to pathogens and enhancing the body's natural defenses.
