A new study by by German researchers has concluded that face masks can cause carbon dioxide poisoning when worn even for short periods and may have contributed significantly to stillbirths when worn by pregnant women, as well as testicular dysfunction and cognitive decline in children, among other destructive health issues.

As reported by the Daily Mail, the research, published in the journal Heliyon, comprises a review of 43 previously published studies on exposure to CO2, mask-wearing, and pregnancy.