One of the most commonly used synonyms for "visitation sick" is "hospital onset illness." This term is often used to describe the illnesses acquired by patients or their visitors while they are in a hospital. Another term that is frequently used in conjunction with visitation sick is "nosocomial infection." This refers to infections that are acquired in a hospital or other healthcare setting. Other terms that are sometimes used as synonyms for visitation sick include healthcare-associated infection, hospital-acquired infection, and iatrogenic infection. Regardless of the specific terminology used, the concept remains the same: these illnesses are acquired through exposure to disease while in a healthcare setting.