What is hantavirus?

Where to start

If you cleaned a cabin or storage

Worried about a recent rodent cleanup?

Why dry-sweeping is the risky part, what "wet" CDC-aligned cleanup actually involves, and what to do if you already swept.

Start with cleanup →

If you have symptoms

Worried about symptoms in yourself or someone else?

Early flu-like illness vs. the late-phase shortness of breath that needs urgent care, and how clinicians evaluate it.

Start with symptoms →

If a headline scared you

Anxious from a news story or podcast?

The calm reading of recent outbreak coverage, U.S. baseline risk, and the person-to-person question.

Start with the calm version →

In the news

Headlines we’re tracking this week

Recent hantavirus coverage, with the closest reality-check on this site next to each one. See the full list on our news page.

1. The hantavirus quarantine is over. Here’s what cruise passengers and scientists learned.

   NBC News · Jun 21 · Reality check →

2. Thirty-eight Filipino crewmembers of MV Hondius, which was hit by an outbreak of Andes hantavirus during voyage, returned to the country on Friday after completing a 42-day quarantine in the Netherlands. http://tiny.cc/8se5101

   facebook.com · Jun 21 · Reality check →

3. Does the Recent Hantavirus Outbreak Highlight a Critical Gap for NanoViricides' NV-387

   Kavout · Jun 21

4. ‘It’s not science, it’s coercion’: health experts decry RFK Jr order on hantavirus quarantine

   The Guardian · Jun 20

5. How Andes virus broke the rules

   felixonline.co.uk · Jun 20

Headlines refreshed Jun 21. Source: public news feeds (Google News). Linking a headline is not endorsement — the link goes to the publication.

Hantaviruses are a family of viruses spread mainly by rodents. In North America, some types can cause Hantavirus Pulmonary Syndrome (HPS) — a severe lung illness that can progress quickly. This site summarizes what health authorities publish so you can understand risk, symptoms, and prevention; it does not replace a clinician or official guidance. Every page lists its sources and a last reviewed date so you can verify what you read.

If you arrived here from a panicked Google search, the structure of the site is intentional: there is a what-to-do-next path through it, organized around the three things that actually matter for most U.S. readers — understanding how exposure happens, what to watch for, and how to prevent the high-risk situations in the first place.

Why people look this up

Search interest often spikes when hantavirus is mentioned in the news or on podcasts. That attention is a good moment to share accurate, sourced information: how the virus spreads, what symptoms can look like, and practical steps like rodent-proofing and safe cleanup of rodent waste. The current outbreak-driven traffic also overlaps with anxiety about person-to-person spread; for the calm version of that question see Can hantavirus spread person to person? and Cruise ship outbreak: what U.S. readers should know.

Key facts (high level)

• Reservoir: In the United States, deer mice and some related rodents are important carriers for the virus that causes most U.S. HPS cases. Details vary by region; see the CDC pages linked below and the Hantavirus in the United States guide for the U.S.-specific picture.
• How it spreads to people: Exposure is usually tied to rodent urine, droppings, or nesting materials — for example, breathing tiny particles stirred up during cleaning, or touching contaminated surfaces and then your face. Person-to-person spread is not typical for the hantavirus strains common in the U.S.; the CDC notes exceptions elsewhere in the world (such as Andes virus). The clean version of those distinctions lives on Transmission and Can hantavirus spread person to person?.
• Illness course: Early symptoms can resemble flu-like illness; severe shortness of breath can follow. Anyone with worsening breathing problems should seek urgent medical care. See Symptoms and HPS incubation and symptom timeline.
• No specific cure: The CDC states there is no specific treatment for hantavirus infection; care is supportive and severe HPS may require breathing support in a hospital. See Treatment and recovery.
• HPS is not the only syndrome: Hantaviruses can also cause hemorrhagic fever with renal syndrome (HFRS) — a different, kidney-focused pattern. Seoul virus is a HFRS-causing hantavirus the CDC notes is found worldwide, including in the United States. See HFRS and Seoul virus.

What to do next

Three short paths through the site, depending on why you are here:

If you are worried about a recent rodent cleanup or cabin opening:

1. Read Rodent droppings cleanup for the dust-aware method (and what to do if you already swept).
2. Read Seasonal cabins, storage, and RVs for the opening-day checklist.
3. Bookmark Symptoms and HPS incubation and symptom timeline so you know what to watch for.

If you are worried about symptoms in yourself or a household member:

1. Read Symptoms for the CDC-aligned outline.
2. See Hantavirus (HPS) vs flu for why early illness is confusing.
3. Read Diagnosis and testing for the shape of the clinical evaluation.
4. Contact a clinician promptly for worsening breathing or severe illness. Mention any rodent exposure.

If you are anxious from a news headline:

1. Read Cruise ship outbreak: what U.S. readers should know for the calm interpretation.
2. Read Andes virus for the specific strain at the center of the cluster and how it differs from U.S. HPS-causing strains.
3. If a “states with returning passengers” map made you worried, read Hantavirus and U.S. states: what the cruise passenger map actually tells you.
4. If you were on the Hondius or in close contact with someone who was, see Hondius cruise passengers: what U.S. authorities say to do.
5. Then revisit your own Prevention routine — that is the action you actually control.

For the canonical bibliography see Sources; for short answers to common questions see FAQ.

Topic guides (search-friendly)

These pages expand on high-intent questions while staying tied to CDC sources:

• Symptoms — CDC-aligned overview of early and late HPS features.
• Transmission — exposure routes in plain language.
• Prevention — Seal Up, Trap Up, Clean Up framing.
• Rodent droppings cleanup — why dry-sweeping is risky and what “wet” CDC-aligned cleanup means.
• HPS incubation and symptom timeline — incubation window (1–8 weeks) and early vs. late phases in CDC wording.
• Hantavirus in the United States — deer mice, rural or seasonal settings, and where risk actually comes from.
• Hantavirus (HPS) vs flu — why early illness is easy to confuse with influenza, without turning the page into a symptom checker.
• Treatment and recovery — supportive care, no “home cure,” when breathing support may be needed (CDC framing).
• Diagnosis and testing — why recognition is hard early, testing in broad strokes, see a clinician.
• Seasonal cabins, storage, and RVs — opening a closed cabin or stored camper without creating dust from rodent waste.
• HFRS and Seoul virus — kidney syndrome vs. lung (HPS), Seoul in the U.S., Andes nuance.
• Can hantavirus spread person-to-person? — U.S. CDC baseline vs. Andes-outbreak nuance in plain language.
• Cruise ship outbreak: what U.S. readers should know — a calm interpretation page for headline-driven search spikes.

How to read this site

This is a small, deliberately quiet reference. A few notes that may help you use it well:

• Every page lists its sources at the bottom, with the date the page was last reviewed against them. If a CDC page changes, the matching page here should be updated and a note added to Updates.
• No diagnostic language. The site does not tell anyone they “have” anything. It points consistently back to clinicians for individual decisions.
• Internal links are part of the design. Topics interconnect — symptoms link to timing, timing links to vs-flu, vs-flu links to diagnosis, and so on — so you can follow a question without bouncing between unrelated tabs.
• External links go to CDC, WHO, and ECDC. When you want the primary text, those are the right destinations.

If you maintain this site as an agent or editor, bump last_reviewed in frontmatter when CDC pages change materially, and add a line to Updates.