This whole thing was a test - a test that cost thousands of lives, but a test of our very own making. The test was if we could survive ourselves... as ourselves.
What exactly is 'suspicious' about a 14-year-old having bad skin? It would be more suspicious if a 14-year-old had good skin. A 14-year-old with good skin is probably two 7-year-olds in a trench coat.