A Simple Guide to Hantavirus

Seeing stories of hantavirus in the news might leave you wondering what it means for you and your family. With hantavirus, as with any health concern, awareness is the best place to start.

The facts about hantavirus are reassuring, but there are some things to consider, especially for people cleaning out garages, cabins, and storage spaces. Here is what hantavirus is, how it spreads, and the simple steps that keep your family safe.

What Is Hantavirus?

Hantavirus is not one single illness. It is a family of viruses, and most forms spread to people through contact with infected rodents, usually through their droppings, urine, or saliva. Houstonia Magazine talked to health experts who note that most U.S. cases have historically turned up out West, not along the Gulf Coast. Also, hantavirus is rare even where rodents are common.

The news coverage in the spring of 2026 detailed an outbreak aboard the cruise ship MV Hondius involving a rarer strain called the Andes virus. Two Texas residents who had been on board were monitored for weeks and never showed signs of infection. Monitoring ran that long because symptoms can occur 1 to 6 weeks (median 2–3 weeks (average ~18 days), after a real hantavirus exposure. The outbreak was declared over on July 2, 2026, and there were no cases in the United States.

How Does It Spread?

Most people who get hantavirus breathe in tiny particles after disturbing rodent nests or droppings, often while cleaning out a shed, garage, or cabin. The Andes strain behind the cruise outbreak is unusual because it can pass between people, but only through close, prolonged contact. You will not catch it by walking past someone or sitting near them at a sports match.

To be clear, infections are rare, but the illness is serious when it does occur. A Beaumont woman recently told 12NewsNow about losing her healthy 29-year-old brother to hantavirus in 2007, after he helped clean out a relative’s garage. While cases are uncommon, the community still needs to be aware of the facts.

How Is It Different from COVID?

There is some online misinformation out there that needs correcting. Hantavirus and COVID behave very differently from each other.

• COVID spreads easily through the air between people. Most hantavirus does not spread person to person at all.
• COVID spreads efficiently and sustains itself through a community. The Andes Hantavirus strain needs close, prolonged contact and does not set off self-sustaining community chains.
• Most hantavirus traces back to rodents, not to crowds of people.

The contagious Andes strain is nowhere near as transmissible as COVID. U.S. health officials have stressed this is not COVID and not the flu, and that the country has confirmed fewer than 900 cases total since 1993. A stadium of fans is simply not a hantavirus risk the way a mouse-infested attic is.

Practical Steps for Prevention

Anytime crowds gather, it’s smart to prioritize your health. However, everyday illnesses have a greater impact in our area than hantavirus.

“Focus on proportion,” said Dr. Asim Jani, a physician at Legacy Community Health. “A rare illness in the headlines is still rare. The illnesses most likely to affect your family are the boring ones: flu, norovirus, West Nile virus, and heat illness. Those are the ones with real numbers behind them here. What I’d rather families spend that worry on is the flu shot they haven’t scheduled.”

There are, however, a few simple things you can do to protect your family from hantavirus.

• Seal gaps and holes where mice or rats could sneak inside.
• Store food in containers rodents cannot chew through.
• Do not let clutter pile up in the garage or shed, since that is exactly where rodents like to settle in.
• Never sweep or vacuum dry droppings, since that sends particles into the air.
• Put on gloves and an N95 mask, and open a window to air out the space first. Wet the area with a bleach solution (about 1.5 cups of bleach per gallon of water) or an EPA-registered disinfectant, let it soak for at least five minutes, then wipe it up with a damp paper towel and seal the waste in a bag. Wash your hands well with soap and water afterward.

Symptoms to Watch For

Early hantavirus can feel like many other illnesses, which is what makes it tricky. Symptoms often appear one to six weeks after exposure and may include:

• Fever
• Headache
• Muscle aches
• Stomach trouble like nausea, vomiting, or belly pain

In serious cases, the lungs are affected, and breathing becomes difficult.

Dr. Jani says the tell is often what is absent. “Flu and COVID usually come with upper respiratory symptoms. Hantavirus typically doesn’t,” he said. The runny nose and congestion you might expect from a cold are often missing.

When Should You See a Doctor?

Trust your instincts. If you feel sick after cleaning a space where rodents may have been, or after recent travel, mention that exposure to your provider. It helps them connect the dots faster, since hantavirus is easy to mistake for something common.

There is no specific cure, but catching it early improves the chance of recovery. Care is supportive and works best in a hospital, with oxygen and careful fluid management. If breathing becomes difficult after a possible exposure, treat it as an emergency and get care right away.

At Legacy, our belief in Health Beyond Care means we are here for everyday questions and unexpected worries alike, not only emergencies. If something feels off, our primary care team can help you figure out what is going on. “Having a doctor you can call is what keeps a scare from becoming a crisis,” said Dr. Jani.

Learn more: For clear, current information on hantavirus, see the CDC’s hantavirus page and its Andes virus overview. Details on the 2026 cruise-ship outbreak are in the WHO outbreak update.

Sources: NEJM article (7/15/26) | ABC13 Houston | Houstonia Magazine | CW39 | Associated Press | 12NewsNow | World Health Organization | CDC