Last reviewed 2026-05-14
Hantavirus vs COVID-19 — Symptom Comparison
Hantavirus pulmonary syndrome and COVID-19 can both cause fever and shortness of breath, and the 2026 MV Hondius cruise-ship outbreak has heightened public anxiety. Here is how the two illnesses actually differ.
Item A
Hantavirus pulmonary syndrome (HPS)
Hantaviridae · rodent-borne
Acute pulmonary illness caused by New World hantaviruses, primarily from inhaling aerosolized rodent excreta. Rapid progression to pulmonary edema; ~35–40% case-fatality rate.
More on Hantavirus pulmonary syndrome (HPS) →Item B
COVID-19
SARS-CoV-2 · respiratory virus
Acute respiratory illness caused by SARS-CoV-2, transmitted person to person via respiratory droplets and aerosols. Wide spectrum of severity; overall case-fatality near 0.5–1%.
Side-by-side
| Feature | Hantavirus pulmonary syndrome (HPS) | COVID-19 |
|---|---|---|
| Cause | Hantavirus (RNA, Hantaviridae) | SARS-CoV-2 (RNA, Coronaviridae) |
| Incubation period | 1–8 weeks | 2–14 days (typically 5) |
| Primary transmission | Inhaling rodent excreta; rarely human-to-human (Andes virus only) | Respiratory droplets and aerosols between humans |
| Typical early symptoms | High fever, severe muscle aches, profound fatigue, headache | Fever, cough, sore throat, loss of taste/smell, congestion |
| Distinctive late feature | Rapidly progressive pulmonary edema; cardiogenic shock | Bilateral viral pneumonia; rarely requires ECMO |
| Case fatality rate | 35–40% | 0.5–1% (varies with age and variant) |
| Diagnostic test | RT-PCR or IgM/IgG ELISA | RT-PCR or rapid antigen test (widely available) |
| Vaccine | None licensed (in North America/Europe) | Multiple licensed mRNA and protein-subunit vaccines |
| Community spread | Essentially none (except Andes virus in close contacts) | Yes — sustained, global |
What they share
- ●Both can begin with fever and feel like a bad flu.
- ●Both can progress to severe pneumonia and respiratory failure.
- ●Both have caused cruise-ship outbreaks (COVID-19 globally in 2020; Andes hantavirus on the MV Hondius in 2026).
What sets them apart
- ●COVID-19 spreads readily between humans; hantavirus does not (with the rare exception of Andes virus in close contact).
- ●Hantavirus has a much longer incubation period (weeks vs days).
- ●Hantavirus mortality is roughly 40× higher than COVID-19 mortality on average.
- ●COVID-19 has widely-available rapid testing and effective vaccines; hantavirus has neither in most countries.
- ●Hantavirus exposure requires direct contact with rodents or rodent-contaminated environments — there is no community spread.
Bottom line
If you have respiratory symptoms after potential exposure to other people with a cough — particularly indoors — COVID-19 is the overwhelmingly more likely diagnosis. Get a rapid test. Hantavirus should be considered only when there is documented or plausible exposure to rodents or rodent droppings, particularly in rural settings or in regions endemic for the virus. The MV Hondius outbreak is an exception that proves the rule: it required an unusual cruise-ship setting with shore-side exposure to an endemic reservoir.