Mucormycosis (black fungus) is a rare but serious fungal infection. It typically results from exposure to mucor molds, which are naturally present in soil, plants, manure, and decaying fruits and vegetables. These molds can also be found in the noses and sinuses of healthy individuals. Mucormycosis is not a contagious disease; it does not spread from person to person. Transmission occurs through inhaling fungal spores from the environment or through contact with contaminated surfaces. Although rare, the infection can rapidly progress and be life-threatening, especially in individuals with weakened immune systems. This infection, also known as zygomycosis in literature, primarily affects individuals whose immune systems are compromised due to various health issues. While the human body naturally hosts many microorganisms, a strong immune system typically keeps them under control. In humans, mucormycosis most commonly affects the brain, sinuses, and lungs.