Disclaimer: Early release articles are not considered as final versions. Any changes will be reflected in the online version in the month the article is officially released.
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 4
Frequency of reported syndromes during outbreaks of unknown cause identified by open-source intelligence, 2020–2022*
| Disease or syndrome |
Frequency, no. (%) |
| Unknown | 107 (43.0) |
| Respiratory syndrome | 38 (15.3) |
| Febrile syndrome | 38 (15.3) |
| Acute gastroenteritis | 36 (14.5) |
| Meningitis | 16 (6.4) |
| Fever with rash | 7 (2.8) |
| Encephalitis syndrome | 6 (2.4) |
| Acute flaccid paralysis | 1 (0.4) |
*Total 249 reports with data on syndromes.
Page created: January 15, 2025
Page updated: January 21, 2025
Page reviewed: January 21, 2025
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.