Readmission refers to the process in which a patient is admitted to the hospital again shortly after being discharged. This can be due to a variety of factors such as complications from their initial treatment, ineffective follow-up care, or underlying health issues. Readmission rates are often used as a measure of the quality of care provided by a hospital or healthcare facility. Research in this area focuses on identifying risk factors for readmission, developing interventions to reduce readmission rates, and improving transitions of care for patients to prevent unnecessary hospital readmissions.