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.
The year-over-year growth in the number of new smartphone users in the U.S. has grown rapidly in recent years. As the chart below illustrates, it grew from about 10-15 million new users per year to a peak of about 35 million in the fourth quarter of 2011.