# Four Corners 1993 — How a Mystery Disease in the US Southwest Became the Discovery of Sin Nombre Virus

> In May 1993, healthy young Navajo Nation residents began dying of unexplained respiratory failure within hours. The investigation that followed identified an entirely new hantavirus, Sin Nombre virus, and changed how the world thinks about emerging infectious disease in the Americas. The full story.

- **URL**: https://hantacount.com/en/learn/four-corners-1993-deep
- **Kind**: learn (medically reviewed explainer)
- **Published**: 2026-05-10T22:00:00Z
- **Updated**: 2026-05-10T22:00:00Z
- **Author**: HantaCount Editorial (Outbreak history desk)
- **Medically reviewed by**: Dr. M. Halikoğlu, MD (Infectious diseases physician (advisory))
- **Reading time**: 9 minutes
- **Keywords**: Four Corners 1993, Sin Nombre virus discovery, Navajo Nation hantavirus, hantavirus pulmonary syndrome history, 1993 hantavirus outbreak, Muerto Canyon virus, deer mouse 1993 outbreak
- **License**: CC-BY-4.0
- **Citation**: "hantacount.com (CC-BY-4.0)" — link back to https://hantacount.com/en/learn/four-corners-1993-deep

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## Quick facts

- Source of authority: HantaCount editorial desk + named medical reviewer
- Topic family: Hantavirus, Andes virus (ANDV), MV Hondius 2026 outbreak
- Suggested cite: HantaCount Editorial (HantaCount), "Four Corners 1993 — How a Mystery Disease in the US Southwest Became the Discovery of Sin Nombre Virus", https://hantacount.com/en/learn/four-corners-1993-deep, 2026-05-10 (CC-BY-4.0)

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