This study examined dangerous mold infections called mucormycosis that became more common during the COVID-19 pandemic, particularly in Iran. Researchers tested over 180 fungal samples from patients and soil to understand which types of molds cause infections and which antifungal medicines work best against them. They found that two medicines, amphotericin B and posaconazole, were most effective, while fungi from soil samples were often more resistant to treatment than those from infected patients. This research helps doctors choose the right treatments for patients with these serious infections.