---
id: "washington-mv-hondius-monitoring-2026"
type: "official-alert"
title: "Washington separates MV Hondius Andes exposure monitoring from unrelated Sin Nombre event"
geography: "Washington, United States / MV Hondius exposure monitoring"
date: "2026-05-15"
status: "Official state health department update"
canonical: "https://hantavirusmaps.org/event/washington-mv-hondius-monitoring-2026"
license: "CC-BY-4.0"
---

# Washington separates MV Hondius Andes exposure monitoring from unrelated Sin Nombre event

Washington State Department of Health · State response update

## Summary

Washington DOH said it was assisting with two separate hantavirus-related investigations: three King County residents potentially exposed to Andes virus linked to the MV Hondius event, and a separate unrelated local hantavirus infection. DOH emphasized that the virus strains and exposure circumstances were different and not connected, and that public risk remained very low.

## Safe interpretation

State response update only. Andes virus exposure monitoring and routine Sin Nombre virus risk must remain separated; this is not a Washington live case feed, patient-location dataset, or evidence of local Andes virus spread.

This record is a reviewed public health map note. It is not live surveillance, medical advice, patient-location tracking, or county-level risk prediction.

## Key fields

| Field | Value |
|---|---|
| Geography | Washington, United States / MV Hondius exposure monitoring |
| Date / period | 2026-05-15 |
| Status | Official state health department update |
| Layer | Public health alerts |
| Agency | Washington State Department of Health |
| Status | Official state health department update |

## Sources

- Washington State Department of Health: [Washington health officials assisting with hantavirus investigations involving two different virus strains in two separate events](https://doh.wa.gov/newsroom/washington-health-officials-assisting-hantavirus-investigations-involving-two-different-virus) — reviewed 2026-05-19; use: Washington state update separating MV Hondius Andes-virus exposure monitoring from an unrelated local Sin Nombre hantavirus infection investigation.
- Centers for Disease Control and Prevention: [Interim Guidance for Public Health Assessment and Management of People with Potential Exposure to Andes Virus](https://www.cdc.gov/hantavirus/php/emergency-guidance/index.html) — reviewed 2026-05-14; use: CDC risk-stratification and monitoring guidance for people potentially exposed through the MV Hondius Andes virus outbreak, including 42-day monitoring and high-risk/low-risk contact definitions.
- World Health Organization: [Hantavirus cluster linked to cruise ship travel, Multi-country](https://www.who.int/emergencies/disease-outbreak-news/item/2026-DON601) — reviewed 2026-05-14; use: Latest WHO Disease Outbreak News update for the MV Hondius Andes virus cluster, including 11 reported cases, eight confirmed Andes virus infections, two probable cases, one inconclusive case, three deaths, and low global risk assessment as of 13 May 2026.

## Cite this record

https://hantavirusmaps.org/event/washington-mv-hondius-monitoring-2026 (accessed YYYY-MM-DD)

Dataset: https://hantavirusmaps.org/data/map-snapshots.json