Hantavirus Symptoms and Prevention: What to Know in 2026

Hantavirus has been in the news again, and it is understandable to want clear, accurate information. Here is what hantavirus is, the symptoms to watch for, how it spreads, and how to prevent it, drawn from current CDC guidance.

What Is Hantavirus?

Hantaviruses are a family of viruses spread mainly by rodents like mice and rats. In the United States, they can cause hantavirus pulmonary syndrome (HPS), a serious illness that affects the lungs. According to the CDC's overview of hantavirus, people most often get infected through contact with infected rodents or their urine, droppings, and saliva. The disease is rare, but it can be severe.

Hantavirus Symptoms in Humans

Per CDC, early symptoms of HPS usually appear 1 to 8 weeks after contact with an infected rodent and are easy to confuse with the flu:

•     Fever and chills

•     Muscle aches, especially in the thighs, hips, and back

•     Headache, nausea, and fatigue

Four to ten days later, late symptoms can appear, including coughing and shortness of breath as the lungs fill with fluid. Because early symptoms mimic other illnesses, anyone with these signs and recent rodent exposure should seek care promptly and mention that exposure.

How Hantavirus Spreads

Understanding how hantavirus spreads makes prevention much clearer. People most often become infected by breathing in tiny airborne particles when fresh rodent urine, droppings, or nesting materials are stirred up, for example, while sweeping or cleaning an area where mice have been active. Less commonly, it can spread through direct contact with these materials or a rodent bite. Importantly, in the United States, the hantavirus that causes HPS is not known to spread from person to person, so you can't catch it from someone who is sick. The risk comes from rodents and the spaces they've contaminated, which is why closed-up sheds, cabins, basements, and storage areas warrant extra caution.

Who Is at Higher Risk?

Anyone who comes into contact with infected rodents can get hantavirus, but some situations raise the risk. Opening and cleaning buildings that have been closed for a season, such as cabins, sheds, garages, and barns, is a classic high-risk scenario, as is living or working where there's an active rodent infestation. People involved in cleanup, pest control, or rural and agricultural work may simply encounter rodents more often. The encouraging news is that the same precautions protect everyone: control rodents, and never clean up droppings in a way that sends particles into the air.

How to Prevent Hantavirus

Avoiding rodents and their droppings is the best prevention. CDC's prevention guidance recommends:

•     Seal up gaps where rodents can enter your home

•     Set traps and control infestations

•     Never sweep or vacuum fresh droppings, which can stir the virus into the air instead. Ventilate the area, wet droppings with disinfectant, and wear gloves when cleaning up

•     Take extra precautions when cleaning sheds, cabins, or storage spaces that have been closed up

Cleaning Up Rodent Droppings Safely

How you clean matters enormously. The single most important rule is to never sweep or vacuum fresh droppings or nesting materials, because that's exactly what launches the virus into the air, where it can be inhaled. Instead, open windows and doors to air out a closed space for about thirty minutes before you start. Then wear gloves and thoroughly wet the area with a disinfectant or a bleach solution, let it sit, and wipe it up with paper towels rather than sweeping. Double-bag the waste, disinfect surfaces, and wash your hands well afterward. For heavy infestations or large contaminated spaces, it's worth taking extra precautions or seeking professional help.

Is There a Treatment for Hantavirus?

There is no specific antiviral cure for hantavirus, which is exactly why prevention and early care matter so much. Treatment is supportive care focused on helping the body through the illness, and in severe cases, this may include intensive care and oxygen support as the lungs are affected. Because HPS can progress quickly and its early symptoms mimic the flu, anyone who develops fever, muscle aches, and especially cough or shortness of breath after possible rodent exposure should seek medical attention promptly and mention that exposure. Catching it early gives supportive care the best chance to work.

When to Seek Care

If you develop flu-like symptoms after possible rodent exposure, and especially if you develop a cough or shortness of breath, seek medical care quickly. For the latest situation updates, the CDC hantavirus pages are the authoritative source.

Same-Day Evaluation in Naperville

Concerned about symptoms after possible rodent exposure? Our walk-in urgent care in Naperville can evaluate you the same day. Book an appointment or stop in. Not sure where to go for care? See our guides to primary care vs. urgent care and the benefits of telehealth visits

FAQs

What are the first symptoms of hantavirus?

Fever, chills, muscle aches, headache, nausea, and fatigue usually occur 1 to 8 weeks after rodent exposure, sometimes followed by cough and shortness of breath.

How do people get hantavirus?

Mainly by breathing in air contaminated with infected rodent urine, droppings, or saliva, or through contact with these materials.

Is there a treatment?

There is no specific antiviral cure; care is supportive, which is why early medical attention matters.

Can hantavirus spread from person to person?

In the United States, the hantavirus that causes HPS is not known to spread between people the risk comes from infected rodents and contaminated spaces.

What should I do if I find rodent droppings?

Don't sweep or vacuum them. Air out the space, then wear gloves, wet the area with disinfectant, wipe with paper towels, double-bag the waste, and wash your hands.