**2.10 Face mask can cause oxygen deficiency or carbon dioxide intoxication**

Many proponents of this misinformation have held on to this to dissuade people from adhering to the use of face mask. The use of a face mask can be discomforting. When properly worn, a face mask does not result in either oxygen deficiency or CO2 intoxication. It is advised that face mask be properly worn, not to be worn during exercise activities or when swimming and disposable masks should not be reused.
