evidence: A recent study published in the journal Ecotoxicology and Environmental Safety and on the National Institutes of Health (NIH) website suggests that wearing N95 Covid masks, specifically KF94 medical masks, may expose individuals to a dangerous level of toxic volatile organic compounds (TVOCs). [...] However, they also noted that "exposure can be significantly reduced if a mask is opened and left to sit for at least 30 minutes," suggesting that the packaging of these masks could play a role in the chemical levels they contain. [...] The study builds off previous research suggesting that mask-wearing could cause more harm than good, including a study by the Cochrane Institute that suggested face masks made "little to no difference" in Covid infections and deaths.