The category denotes a human flavivirus infection that cannot be assigned to one specific flavivirus because available testing is non-specific, fails to identify the virus, or identifies a flavivirus not otherwise classified [1]. Confirmed notification requires stated laboratory and clinical evidence under the national case definition [1].
Disease overview
Evidence-backed information EN 1/5 applicable sections · ZH 1/5 applicable sections Updated Oct 23, 2026
Flavivirus infection (unspecified) is an Australian national surveillance category applied when a human flavivirus infection cannot be attributed to a single known virus due to non-specific or unclassifiable laboratory findings [1]. The classification serves as a reporting and laboratory-classification boundary rather than a clinical disease entity with uniform course [1]. Zika virus is handled separately within the notification system [1].
Read the full clinical and epidemiological profile 2
- 1 Australian Government Department of Health and Aged Care. Department of Health and Aged Care | Revised surveillance case definitions: brucellosis and Flavivirus infection (unspecified) including Zika virus [Internet]. cited 23 Oct 2026. Available from: https://www1.health.gov.au/internet/main/publishing.nsf/Content/cda-cdi4002l.htm
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