evidence: Mask study published by NIH suggests N95 Covid masks may expose wearers to dangerous level of toxic compounds linked to seizures and cancer - A study published in April found disposable masks can have toxic chemicals - Experts said this could make newly instated mask mandates ineffective - READ MORE: Mask mania sweeps America...AGAIN [...] But a study quietly re-shared by the National Institutes of Health in spring suggests the tight-fitting mask may expose users to dangerous levels of toxic chemicals. [...] A study published in April found that several disposable masks contain more than eight times the US recommended limit of toxic volatile organic compounds (TVOCs)