During the COVID-19 pandemic, many hospitalized patients developed fungal infections caused by Candida yeasts alongside their coronavirus infection. Researchers studied 71 Candida samples from COVID-19 patients to understand how these fungi cause disease by examining three damaging enzymes they produce and their ability to form protective biofilm layers. The findings showed that these fungi are highly virulent, producing strong enzyme activity that helps them invade tissues and resist treatment, which helps explain why these infections are particularly dangerous in COVID-19 patients.