Not mine but some more:
Prolonged mask use (>4 hours per day) promotes facial alkalinization and inadvertently 270
encourages dehydration, which in turn can enhance barrier breakdown and bacterial infection risk [33]. 271
British clinicians have reported masks to increase headaches and sweating and decrease cognitive 272
precision [34]. Survey bias notwithstanding, these sequelae are associated with medical errors [35]. By 273
obscuring nonverbal communication, masks interfere with social learning in children [36]. Likewise, 274
masks can distort verbal speech and remove visual cues to the detriment of individuals with hearing loss; 275
clear face-shields improve visual integration, but there is a corresponding loss of sound quality [37, 38].