A hospital infection, also known as a healthcare-associated infection (HAI), is an infection that a patient acquires while receiving treatment in a healthcare setting, such as a hospital, nursing home, or outpatient clinic. HAIs can occur as a result of the use of invasive medical devices, such as catheters or ventilators, or from exposure to bacteria or other pathogens that are present in the healthcare environment. They can also occur as a result of poor hygiene practices by healthcare workers. HAIs can range from mild to severe and can be caused by a variety of organisms, including bacteria, viruses, fungi, and parasites. They can affect any part of the body and can lead to serious complications, including sepsis, organ failure, and even death. It is important for healthcare facilities to take steps to prevent the spread of infections and to implement infection control measures to protect patients and healthcare workers.