A surveillance category applied to human flavivirus infections that cannot be assigned to one specific flavivirus because available testing is non-specific, cannot identify the virus, or identifies a flavivirus not otherwise classified [1]. The national definition requires stated laboratory and clinical evidence for confirmed notification, with separate handling preserved for Zika virus classifications [1].
Disease overview
Flavivirus infection (unspecified)
黄病毒感染（未特指）
Evidence-backed informationEN 1/5 applicable sections · ZH 1/5 applicable sectionsUpdated Sep 4, 2026
Flavivirus infection (unspecified) is an Australian national surveillance category used when laboratory testing for a human flavivirus infection cannot attribute the infection to a single known flavivirus, whether due to non-specific results, inability to identify the virus, or identification of an unclassified flavivirus [1]. The national definition specifies laboratory and clinical evidence requirements for confirmed notification and retains distinct handling for Zika virus classifications [1]. Compatible clinical presentations include non-encephalitic febrile illness and encephalitic illness, though this classification scope does not imply that all flavivirus infections share identical clinical courses or prevention measures [1]. This category functions as a reporting and laboratory-classification boundary rather than a distinct clinical entity [1].
Read the full clinical and epidemiological profile2
- 1Australian 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 4 Sept 2026.Available from: https://www1.health.gov.au/internet/main/publishing.nsf/Content/cda-cdi4002l.htm
Coverage
Reporting countries and regions
Trends by reporting country
Monthly patterns over time
Data access
Page dataset index with source links and update metadata.
Official sourcesAuthority, cadence, notes9
Australia NINDSS
Australia
Australian national notifiable diseases surveillance dashboard.
Australia NINDSS — Australian Capital Territory
Australian Capital Territory, Australia
Australian NINDSS monthly state/territory notifications for Australian Capital Territory, kept separate from the Australia national aggregate.
Australia NINDSS — New South Wales
New South Wales, Australia
Australian NINDSS monthly state/territory notifications for New South Wales, kept separate from the Australia national aggregate.
Australia NINDSS — Northern Territory
Northern Territory, Australia
Australian NINDSS monthly state/territory notifications for Northern Territory, kept separate from the Australia national aggregate.
Australia NINDSS — Queensland
Queensland, Australia
Australian NINDSS monthly state/territory notifications for Queensland, kept separate from the Australia national aggregate.
Australia NINDSS — South Australia
South Australia, Australia
Australian NINDSS monthly state/territory notifications for South Australia, kept separate from the Australia national aggregate.
Australia NINDSS — Tasmania
Tasmania, Australia
Australian NINDSS monthly state/territory notifications for Tasmania, kept separate from the Australia national aggregate.
Australia NINDSS — Victoria
Victoria, Australia
Australian NINDSS monthly state/territory notifications for Victoria, kept separate from the Australia national aggregate.
Australia NINDSS — Western Australia
Western Australia, Australia
Australian NINDSS monthly state/territory notifications for Western Australia, kept separate from the Australia national aggregate.