Amid a rise in black fungus cases particularly in COVID patients in Delhi, some medical experts feel that “unhygienic masks” and poorly ventilated rooms could be a contributing factor, while others said “no clinical evidence” has been established linking the two. Doctors at many leading hospitals here said many patients, both COVID and non-COVID ones, have presented themselves at the facilities who have been infected with mucormycosis or black fungus and had a history of exhibiting poor hygienic practices, including wearing unwashed masks for a long time. According to Dr Suresh Singh Naruka, senior consultant, ENT, Indraprastha Apollo Hospitals, the...