evidence: Possible toxicity of chronic carbon dioxide exposure associated with face mask use, particularly in pregnant women, children and adolescents - A scoping review - PMID: 37057051 - PMCID: PMC9981272 - DOI: 10.1016/j.heliyon.2023.e14117 Possible toxicity of chronic carbon dioxide exposure associated with face mask use, particularly in pregnant women, children and adolescents - A scoping review [...] Carbon dioxide increases with face masks but remains below short-term NIOSH limits.BMC Infect Dis. 2021 Apr 16;21(1):354. doi: 10.1186/s12879-021-06056-0. BMC Infect Dis. 2021. PMID: 33858372 Free PMC article.