Patient under investigation

A patient under investigation (or a person under investigation) refers to a person who had been in close contact with a person with confirmed infection or/and may have been to place where there is an outbreak or superspreading event.^[1][2][3] This person exhibits the symptoms of the disease and is required to be tested, and undergo a quarantine or isolation while waiting for the laboratory results.^[4][5][6] It is a term used by health care workers in classifying patients during evaluation and testing in contact tracing in times of infectious disease outbreaks.^[7][8]

• Disease surveillance – Monitoring spread of disease to establish patterns of progression
• Infection control – Medical discipline for preventing nosocomial or healthcare-associated infectionPages displaying short descriptions of redirect targets
• Pandemic prevention – Organization and management of preventive measures against pandemics
• Social distancing – Infection control technique by keeping a distance from each other
• Super-spreader – Event in which 3 or more people attend and an infectious disease is spread much more than usualPages displaying short descriptions of redirect targets
• Transmission – Passing of a pathogen from one organism to anotherPages displaying short descriptions of redirect targets
• Triage – Emergency medical process

• Centers for Disease Control and Prevention's When Caring for Patients Under Investigation (PUIs) or Patients with Confirmed Ebola Virus Disease (EVD)
• Centers for Disease Control and Prevention's Human Infection with 2019 Novel Coronavirus Person Under Investigation (PUI) and Case Report Form
• Centers for Disease Control and Prevention's Evaluating and Testing Persons for Coronavirus Disease 2019 (COVID-19)
• Illinois Department of Public Health's Case Definitions for MERS-CoV Patient Under Investigation (PUI)
• Eurosurveillance's Differential diagnosis of illness in patients under investigation for the novel coronavirus (SARS-CoV-2), Italy, February 2020