Volume 31, Number 2—February 2025
Research
Global Epidemiology of Outbreaks of Unknown Cause Identified by Open-Source Intelligence, 2020–2022
Damian Honeyman, Deepti Gurdasani, Adriana Notaras, Zubair Akhtar, Jared Edgeworth, Aye Moa, Abrar Ahmad Chughtai, Ashley Quigley, Samsung Lim, and Chandini Raina MacIntyre
Table 1
Search terms used for data retrieval and syndromes identified from EPIWATCH, 2020–2022
| Category |
|---|
| Search terms |
| Acute flaccid paralysis |
| Acute gastroenteritis |
| Bronchiolitis |
| Bronchitis |
| Death |
| Die off |
| Encephalitis |
| Encephalomyelitis |
| Fever |
| Food poisoning |
| Illness |
| Influenza-like illness |
| Meningitis |
| Mortality |
| Mysterious |
| Mystery |
| Not known |
| Not specified |
| Not yet classified |
| Pneumonia |
| Rash |
| Suspicious |
| Severe acute respiratory illness |
| Suspicious |
| Unclassified |
| Unclear |
| Undiagnosed |
| Unexplained |
| Unidentified |
| Unknown |
*Includes influenza-like-illness, severe acute respiratory infection, and pneumonia. †Insufficient information in the article for classification.
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Page updated: January 31, 2025
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