By Jules Gomes, Church Militant - "Scientific evidence supporting face masks' efficacy is lacking," but "adverse physiological, psychological and health effects are established," Stanford University cardiologist Dr. Baruch Vainshelboim stressed, noting how masks "restrict breathing, causing hypoxemia and hypercapnia, and increase the risk for respiratory complications, self-contamination and exacerbation of existing chronic conditions."... The scientist also pointed out that there was no scientific evidence supporting the efficacy of masks "for reducing morbidity or mortality associated with infectious or viral diseases."