Dr. Russell Blaylock warns that not only do face masks fail to protect the healthy from getting sick, but they also create serious health risks to the wearer. The bottom line is that if you are not sick, you should not wear a face mask. .
http://www.freerepublic.com/focus/f-news/3845440/posts
There are just as many articles saying why you should wear one. It’s actually up to the person unless a store requires so.