I learned today from a health expert that wearing a mask all the time is really unhealthy and could lead to serious diseases. Masks that are used by experts in medicine for operations and while treating really sick patients are OK as they are discarded immediately after use. People who wear the same masks every day without any care for changing them are building up more and more germs and viruses on the mask. Not only that, they may be restricting the passage of needed oxygen because the masks may not be clean or do not allow enough air to penetrate the nose.
Worn only by experts? What, they took a college class is wearing masks?