EVERYTHING YOU NEED TO KNOW ABOUT HANTAVIRUS.
A 3 PART THREAD. 🧵
PART 1 — THE VIRUS
A virus that lives in mice is spreading person-to-person on a luxury cruise ship in the Atlantic. Three people are dead. Nobody has a cure. And passengers from 23 countries have already flown home.
Hantavirus lives in rodents — deer mice, rice rats, depending on the region. The animals carry it their whole lives and feel nothing. You breathe in their dried urine, droppings, or saliva and it enters your lungs. That is usually all it takes. No bite required. No direct contact. Just air in a room where an infected mouse has been.
The US discovered it the hard way. May 1993. Four Corners region — where New Mexico, Arizona, Colorado, and Utah meet at a single point. A young Navajo couple, both healthy, both fit, died within days of each other from a mystery respiratory illness nobody could name. The victims were not old or sick. A 19-year-old competitive marathon runner collapsed so suddenly his family pulled over at a highway gas station to call for help. He was dead shortly after. His lungs had filled with fluid overnight.
The CDC assembled a task force. Weeks later they identified a completely unknown virus — a new strain never seen in the Western Hemisphere. They named it Sin Nombre. Spanish for "without a name." The nameless virus. That 1993 outbreak killed over 50% of people infected. Frozen tissue samples later confirmed a victim in Utah in 1959 — 34 years before anyone knew what killed him. The virus had been circulating silently the whole time.
The kill mechanism is brutal and fast. Stage one feels like flu. Fever, headache, muscle aches. You think you're fine. Stage two arrives suddenly. Lungs fill with fluid. Blood pressure collapses. Heart starts failing. The gap between feeling sick and being on a ventilator can be hours. There is no cure. No approved antiviral. No vaccine available in the US or Europe. Kill rate: 30 to 60% depending on the strain. Treatment is purely supportive — keep you alive long enough for your immune system to work it out.