South Korean researchers from Jeonbuk National University examined various types of disposable medical-grade masks, including several reusable cotton masks. They discovered that the chemicals emitted by these masks exceeded the recommended safety levels for TVOCs by eightfold. Breathing in TVOCs can cause headaches and nausea, and long-term exposure has been associated with organ damage and even cancer.
“It is clear that particular attention must be paid to the VOCs associated with the use of KF94 [medical] masks their effects on human health,” the study, published in the journal Ecotoxicology and Environmental Safety, said.
