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Practical steps you can take this week — whether you have seen a rodent or not.
With hantavirus back in the news, a lot of people are asking a practical question: what can I actually do about it? The good news is that the steps for reducing hantavirus risk are the same steps for reducing rodent-related risk of any kind — and most of them cost nothing but time and attention.
Here are five things worth doing right now.
1. Do a Thorough Exterior Audit for Entry Points
Rodents are exceptional at finding their way into structures. House mice can fit through openings the size of a dime. Rats can compress through gaps the size of a quarter. They follow utility lines, exploit gaps around pipes, and find cracks in foundations that are easy to overlook.
Walk the perimeter of your home or building and look for:
• Gaps where pipes, cables, or conduits enter the structure
• Cracks in the foundation, especially near the ground
• Spaces under doors, around window frames, and near vents
• Openings around garage doors and crawl space entrances
Seal any gaps you find with steel wool, hardware cloth, caulk, or expandable foam — ideally a combination. Rodents can chew through soft materials, so physical barriers matter.
2. Eliminate Food Sources and Nesting Grounds
Rodents follow food and shelter. If your property offers both, it is more attractive to them — regardless of what your neighbors do. A few straightforward changes make a meaningful difference:
• Store all food — including pet food, bird seed, and compost — in sealed, hard-sided containers rodents cannot chew through
• Keep outdoor trash in bins with secure, tight-fitting lids
• Remove brush piles, wood stacks, and debris that sits directly against the exterior of your building — these are shelter zones
• Trim overgrown vegetation near the building's foundation, which can conceal rodent activity and provide cover for burrowing
3. If You Find Droppings — Do Not Sweep Them Dry
This is one of the most important practical points and it is not well known. Sweeping or vacuuming dry rodent droppings can aerosolize viral particles, which is precisely how hantavirus (and other pathogens) become airborne. The same is true for disturbing nesting material.
If you find evidence of rodent activity indoors, the correct approach is:
• Ventilate the area for at least 30 minutes before starting cleanup (open windows, step away)
• Wear disposable gloves and, ideally, a properly fitted N95 respirator
• Spray the droppings and surrounding area thoroughly with a disinfectant solution — a bleach and water mixture works — and let it soak for at least five minutes
• Wipe up with damp paper towels and dispose of everything in a sealed bag
• Never use a dry brush or vacuum for initial cleanup of rodent waste in a previously infested area
For larger infestations or if you are uncertain, consult a professional. The CDC publishes detailed cleanup guidance for rodent-infested areas that is worth reviewing.
4. Know the Signs of Active Rodent Presence
Catching rodent activity early is far easier than addressing an established infestation. You do not need to see a rodent to know they are present. Look for:
• Droppings along baseboards, behind appliances, in cabinets, or near food storage areas
• Gnaw marks on food packaging, wood, insulation, or electrical wiring
• Greasy rub marks along walls or baseboards — rodents have oily fur and leave marks where they repeatedly travel
• Nesting material (shredded paper, fabric, or plant matter) in out-of-the-way areas like the back of drawers or inside wall voids
• Sounds — scratching or rustling in walls or ceilings, most often at night when rodents are most active
If you identify active signs, act immediately. Rodent populations grow quickly, and a small problem becomes a large one in weeks.
5. Think Long-Term: Population, Not Just Incidents
The reactive mindset — responding only when you see a rodent — keeps you one step behind. Rodent populations exist on a continuum. If the conditions are right, they will continue to press into human spaces regardless of how many individuals you remove.
Long-term risk reduction means changing the conditions themselves. That includes the physical steps above, but it also means thinking about the rodent populations on and around your property as a whole. What is driving them toward your building? What would make your property less hospitable at a population level?
Rodent fertility control methods work by reducing the reproductive success of the population over time — not just removing individuals, but slowing the engine that drives population growth. It is the difference between bailing water and fixing the leak.
A Note on Risk Perspective
Hantavirus is serious, but it is also rare. The actions above are not driven by fear — they are driven by the same logic that motivates people to maintain a smoke detector or check their home for carbon monoxide. Proactive precautions cost little, and the downside of inaction is high enough to make them worthwhile.
Managing your environment thoughtfully is not a response to a news cycle. It is just good practice.
Want to go deeper? Explore our other blog articles about rodent management.
Sources: CDC: How to Clean Up After Rodents · CDC: Hantavirus Prevention · CDC: Controlling Wild Rodent Infestations · CDC: About Hantavirus