On January 31, 2020 the WHO released their interim guidelines for Case Definitions for Surveillance purposes:
- Suspected case
- Probable case
- Confirmed case
A confirmed case: “A person with laboratory confirmation of 2019-nCoV infection, irrespective of clinical signs and symptoms”
WHO Dec 2020 update: A Confirmed Case: “A person with a positive Nucleic Acid Amplification Test (NAAT)”, which is simply a positive RT-PCR test, no symptoms necessary. A positive PCR result makes a healthy person “statistically ill”.