- “Coronavirus Disease 2019 (COVID-19) | 2020 Interim Case Definition, Approved April 5, 2020.” Accessed May 26, 2021. https://wwwn.cdc.gov/nndss/conditions/coronavirus-disease-2019-covid-19/case-definition/2020/
- CDC. “Health Departments.” Centers for Disease Control and Prevention, February 11, 2020. https://www.cdc.gov/coronavirus/2019-ncov/php/contact-tracing/contact-tracing-plan/appendix.html.
- CDC. "Interim Guidance for Implementing Safety Practices for Critical Infrastructure Workers Who May Have Had Exposure to a Person with Suspected or Confirmed COVID-19." Accessed May 26, 2021. https://www.cdc.gov/coronavirus/2019-ncov/downloads/critical-workers-implementing-safety-practices.pdf
- “Contact Tracing in the Context of COVID-19.” Accessed May 26, 2021. https://www.who.int/publications-detail-redirect/contact-tracing-in-the-context-of-covid-19.
- “Public Health Surveillance for COVID-19: Interim Guidance.” Accessed May 26, 2021. https://www.who.int/publications-detail-redirect/who-2019-nCoV-surveillanceguidance-2020.8.
Suspected case of SARS-CoV-2 infection (three options, A through C):
A. A person who meets the clinical AND epidemiological criteria:
B. A patient with severe acute respiratory illness (SARI: acute respiratory infection with history of fever or measured fever of ≥ 38 C°; and cough; with onset within the last 10 days; and who requires hospitalization).
C. An asymptomatic person not meeting epidemiologic criteria with a positive SARS-CoV-2 antigen-detecting rapid diagnostic test (Ag-RDT).
One or more of the following exposures in the 14 days before onset of symptoms:
**Close contact is defined as being within 6 feet for at least a period of 10 minutes to 30 minutes or more depending upon the exposure. In healthcare settings, this may be defined as exposures of greater than a few minutes or more. Data are insufficient to precisely define the duration of exposure that constitutes prolonged exposure and thus a close contact.
A person who has experienced any one of the following exposures during the 2 days before and the 14 days after the onset of symptoms of a probable or confirmed case:
At least two of the following symptoms: fever (measured or subjective), chills, rigors, myalgia, headache, sore throat, new olfactory and taste disorder(s)
At least one of the following symptoms: cough, shortness of breath, or difficulty breathing
Severe respiratory illness with at least one of the following:
No alternative more likely diagnosis
Laboratory evidence using a method approved or authorized by the U.S. Food and Drug Administration (FDA) or designated authority:
Confirmatory laboratory evidence:
Presumptive laboratory evidence:
*Serologic methods for diagnosis are currently being defined.
Confirmed case of SARS-CoV-2 infection (three options, A through C):