What the tracker monitors
The tracker monitors public records about the MV Hondius-linked Andes virus outbreak and selected evergreen public-health guidance about hantavirus, Andes virus, prevention, cleanup, testing, and monitoring.
What the tracker does not do
It does not diagnose disease, provide treatment advice, estimate hidden cases, identify private individuals, assign individual exposure risk, publish confidential health information, or override public-health authorities.
Source hierarchy
- Official public-health authorities: CDC, WHO, ECDC, national or regional health agencies.
- Official health alerts and surveillance materials.
- Institutional sources for institution-specific logistics.
- Peer-reviewed or scientific material for background only.
- Reputable media only for developing context when official sources have not published a fact, and never as verified case status.
Source register
| Source | Source type | Used for | Update frequency | Last checked | Current status | Eligible for headline count | Eligible for changelog | Notes | Link |
|---|---|---|---|---|---|---|---|---|---|
| CDC current situation | Official public-health agency | U.S. current situation, U.S. public/traveler risk, exposed-passenger monitoring context | As CDC updates the situation page | May 26, 2026, 15:00 UTC | Current source reviewed | No | Yes | CDC reports no U.S. confirmed cases from this outbreak and states the broad U.S./traveler risk remains extremely low. | Open source |
| CDC HAN 00528 | Official health alert | Clinical/public-health alert context, testing, monitoring, and infection-control guidance | As CDC HAN notices are issued | May 26, 2026, 15:00 UTC | Historical outbreak notice reviewed | No | Yes | May 8 notice reflected earlier counts; retained for chronology and guidance context. | Open source |
| WHO Disease Outbreak News DON601 | Official international public-health update | Global case counts, risk assessment, reconciliation with ECDC, contact-management context | As WHO publishes Disease Outbreak News | May 26, 2026, 15:00 UTC | Current source reviewed | Yes | Yes | May 13 WHO update reports 11 cases: 8 confirmed, 2 probable, 1 inconclusive, including 3 deaths; ECDC's current daily outbreak page supersedes it for current headline classification. | Open source |
| WHO Disease Outbreak News DON600 | Official international public-health update | Prior outbreak count and response chronology | Historical source | May 26, 2026, 15:00 UTC | Superseded by DON601 for current counts | No | Yes | May 8 WHO update is preserved for change history and earlier source reconciliation. | Open source |
| WHO Disease Outbreak News DON599 | Official international public-health update | Earlier outbreak chronology | Historical source | May 26, 2026, 15:00 UTC | Historical source retained | No | Yes | Preserved as part of the official outbreak source trail. | Open source |
| ECDC Andes hantavirus outbreak page | Official public-health agency | Daily case counts, status categories, deaths, EU/EEA risk, current source update | Daily during active outbreak, including weekends | May 26, 2026, 15:00 UTC | Current source reviewed | Yes | Yes | Current ECDC page was updated May 26 and reports 13 total cases as of May 26, including 11 confirmed, 2 probable, 0 suspected, and 3 deaths. One new case and no new deaths have been reported since the previous update. | Open source |
| Reuters May 15 WHO briefing report | Secondary news report of official briefing | Historical freshness trigger and source-discrepancy note only; not used for headline counts after official public-page reconciliation | Historical article | May 26, 2026, 15:00 UTC | Reconciled by current ECDC public page | No | Yes | Reuters reported that a WHO official said the U.S. inconclusive case tested negative, lowering the global total from 11 to 10. ECDC's later public pages state the previously reported inconclusive case was removed from the case count while continuing to report 11 total cases. | Open source |
| People May 15 WHO briefing report | Secondary news report of official briefing | Corroborating freshness trigger and source-discrepancy note only | Historical article | May 26, 2026, 15:00 UTC | Reconciled by current ECDC public page | No | Yes | People quoted WHO briefing language reporting 10 total cases after the U.S. inconclusive case was considered negative. | Open source |
| CDC prevention | Official public-health guidance | Prevention and rodent-exposure reduction guidance | As CDC guidance changes | May 26, 2026, 15:00 UTC | Evergreen source reviewed | No | Yes | Used for prevention and cleanup-adjacent pages; not used for outbreak counts. | Open source |
| CDC cleanup after rodents | Official public-health guidance | Mouse-droppings cleanup steps and safety warnings | As CDC guidance changes | May 26, 2026, 15:00 UTC | Evergreen source reviewed | No | Yes | Used for practical cleanup guidance; this site does not replace local health department advice. | Open source |
| CDC Andes virus | Official public-health guidance | Andes virus symptoms, incubation period, person-to-person spread, care-seeking guidance | As CDC guidance changes | May 26, 2026, 15:00 UTC | Evergreen source reviewed | No | Yes | CDC identifies Andes virus as the hantavirus known to spread person-to-person, usually through close contact with a sick person. | Open source |
| WHO hantavirus fact sheet | Official international public-health guidance | General hantavirus background and international context | As WHO updates fact sheets | May 26, 2026, 15:00 UTC | Evergreen source reviewed | No | Yes | Used only for broad background; current outbreak counts come from DON/ECDC pages. | Open source |
Official briefing and secondary-report policy
Official public source pages are preferred for headline counts because they are durable, directly inspectable, and date-stamped. A named official press briefing can be eligible for a changelog entry when the briefing source is captured with a durable URL or transcript. Secondary reports that describe a newer official statement are recorded as freshness triggers and discrepancy notes, but they are not promoted to headline case counts unless the source register explicitly marks them eligible for headline use.
Headline-source selection rule
Headline counts come from the latest checked eligible official public-health source with a clear publication date, status split, and source URL. If official sources disagree, this site shows the discrepancy, keeps source dates visible, and avoids collapsing confirmed, probable, inconclusive, suspected, monitored-contact, and non-case categories.
Case status definitions
| Status | Definition |
|---|---|
| Confirmed | Laboratory-confirmed infection according to the reporting public-health source. |
| Probable | A case classified as probable by the reporting public-health source. |
| Suspected | A suspected case pending evaluation; not counted as confirmed or probable. |
| Inconclusive | A case with unresolved or inconclusive laboratory interpretation. |
| Monitored Contact | A person or group monitored after potential exposure; not counted as a case. |
| Non Case | A record reclassified as not meeting the case definition. |
| News Reported Pending | A report not yet confirmed by an official public-health source. |
| Context | A route, operational, or source-context update with no case-count effect. |
Confidence definitions
| Confidence | Definition |
|---|---|
| High | Official public-health source or directly cited official guidance. |
| Medium | Institutional or scientific source that is consistent with official reporting. |
| Low | Insufficiently sourced or outdated information; not used for headline counts. |
| Under Review | A record being reconciled against newer source material. |
Update cadence and reclassification policy
Automated source refresh checks configured outbreak sources on a three-hour cadence. Static pages and exports are rebuilt from source-audited tracker records during production builds. When official sources reclassify suspected, probable, inconclusive, confirmed, monitored-contact, or non-case records, this site updates the affected status category and records the change in the changelog rather than merging categories.
Correction, privacy, and location precision policy
Corrections are reviewed against official source hierarchy and appear in the changelog when they change visible data. Coordinates are public, approximate, and non-identifying; person-level locations are not published. See corrections and privacy.
Limitations and dataset notes
Official sources may differ because of publication time, jurisdiction, date, or definition. The dataset export describes visible public records only. It does not represent a clinical line list, a surveillance database, or medical advice.
Report a correction
See a count, label, source link, or timestamp that appears wrong? Send the page URL, record ID, official source URL, and what should change.
Report a correctionPrimary sources reviewed
CDC, WHO, and ECDC official public-health pages were reviewed for this build. Current outbreak counts use official outbreak updates; evergreen pages use official background and guidance pages.