Perhaps, after reading the following article, this post will help educate people about 1) the symptoms and 2) the severity of the condition.
http://sports.espn.go.com/mlb/news/story?id=2554254
Everyone is entitled to an opinion. Whether or not the mask is partly responsible is an issue. JRut has easily dismissed the possibility. Nothing conclusive has yet been established. Others may have a different perspective. This post may not have provided additional info. Time will tell.