Yes, rodent infestations can significantly worsen asthma symptoms. Rodents like mice and rats shed hair, dander, urine, saliva, and droppings—all of which can become airborne and act as powerful allergens. When inhaled, these particles can irritate the respiratory system, especially in individuals with asthma or other underlying conditions.

Hantavirus is a potentially life-threatening illness transmitted to humans primarily through contact with infected rodents, especially their urine, droppings, or saliva. Inhaling dust particles contaminated by these secretions is one of the most common ways the virus is spread. The most serious form of the disease is Hantavirus Pulmonary Syndrome (HPS), which can cause severe respiratory distress and has a high fatality rate if not diagnosed and treated early.