Danger Level 4: Microbial Growth

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Fungus, including mold and mildew, can cause a wide variety of ailments. As these micro-organisms grow, they produce microscopic spores that can travel on air currents from their sources to all areas within the home. They are so tiny they can easily enter your lungs as you inhale.
The reaction of sensitive individuals ranges from mild to severe.  Symptoms include nose and throat irritation, nasal stuffiness, wheezing, eye irritation, skin irritation, shortness of breath, and asthma flares. Excessive mold has been linked to the development of asthma in children. For immunocompromised people, or for those with chronic lung diseases, there is greater risk of opportunistic fungal infections, according to the Centers for Disease Control and Prevention.