Some facts about shingles include that: 1  Shingles is rare in children under ten years of age. 2  Younger children who do develop shingles tend to have milder symptoms than adults with shingles. 3  People have a 10 to 15 percent chance of developing shingles at some point in their life if they once had chicken pox.
There are approximately 310 million people in the United States. Of these people, approximately 250 million are over the age of 14. According to Comscore, about 235 million of these Americans use mobile devices. It seems likely that almost all of these folks will eventually have smartphones.
MM Research Institute, a Tokyo-based research company says that the number of smartphones sold in Japan in fiscal 2010 grew 370% y-o-y to 8.55 million (40% of those were iPhones). All in all, 23% of all the (over 30 million) cell phones shipped in Japan in 2010 were smartphones. The same company expects smartphones to command 50% of the market in Japan in 2013, meaning 20 of the 40 million cell phones to be shipped that year are projected to be iPhones/Android handsets/etc.