hantavirus.one
Reference page

Hantavirus symptoms

As described by the CDC and Harvard Health.

Not medical advice. This page summarizes the CDC's published descriptions of hantavirus pulmonary syndrome. For your own situation, the authoritative sources are linked at the end of the page, and your national health authority will publish locally appropriate guidance.

Hantavirus pulmonary syndrome (HPS) appears 2 to 3 weeks after exposure (range 1-8 weeks). HPS presents in two phases: early flu-like symptoms (fever, muscle aches in thighs and back) for 1-7 days, then coughing and shortness of breath as the lungs fill with fluid 4-10 days later. The CDC reports HPS case fatality at approximately 38% in the United States.

Hantavirus pulmonary syndrome incubation period is 2 to 3 weeks

The CDC describes hantavirus pulmonary syndrome (HPS) signs and symptoms as appearing 4 to 42 days after exposure, with most HPS cases at 2 to 3 weeks. Harvard Health (May 2026) gives the typical incubation as 2 to 3 weeks with a maximum near 8 weeks. Public health authorities use a 45-day monitoring window for contacts of confirmed hantavirus cases. The first MV Hondius symptom-onset on 6 April 2026 fits this 2-to-3-week window after pre-boarding exposure to Andes virus in Argentina.

Early-phase HPS symptoms: fever and muscle aches in thighs and back

The CDC lists early-phase hantavirus pulmonary syndrome symptoms as fatigue, fever, and muscle aches in the large muscle groups (thighs, hips, back, and sometimes shoulders). The early HPS phase typically lasts 1-7 days from onset. About half of HPS patients additionally report:

Late-phase HPS symptoms: cough and shortness of breath

The CDC describes late-phase hantavirus pulmonary syndrome as marked by coughing and shortness of breath as fluid accumulates in the lungs, typically appearing 4-10 days after the early symptoms. Harvard Health (May 2026) describes late-phase HPS as progressing quickly to acute respiratory distress and shock. Most HPS deaths occur in this late phase. Survival improves substantially when HPS patients reach an intensive care unit before respiratory failure begins.

HPS case fatality is approximately 38 percent in the United States

The CDC reports a case fatality rate of approximately 38% for hantavirus pulmonary syndrome (HPS) in the United States. For Andes virus specifically, CSIRO (May 2026) places the case fatality rate between 35% and 50%. These hantavirus mortality figures reflect historical experience; survival improves with earlier ICU admission and supportive care.

What to do after suspected hantavirus exposure

hantavirus.one does not give medical advice. The CDC's general hantavirus factsheet and your country's national health authority describe the appropriate steps for suspected hantavirus exposure in your situation.

Sources