👉 An infection occurs when a pathogen, such as bacteria, viruses, fungi, or parasites, enters the body and begins to multiply or cause harm to host tissues. This can happen through various routes, including ingestion, inhalation, skin contact, or vector-borne transmission. Once inside, the pathogen can disrupt normal bodily functions, leading to symptoms ranging from mild discomfort to severe illness. For example, a common bacterial infection like strep throat involves bacteria entering the throat and causing inflammation, while a viral infection like the flu leads to widespread cellular disruption. Proper hygiene, vaccination, and medical treatment are crucial in preventing and managing infections to minimize their impact on health.
