When the 37-year-old woman who ran a pet shop in a Los Angeles suburb cut her right middle finger on the metal rim of a tropical-fish tank, she thought nothing of it. The cut seemed to be clean, and ...

When 13-year-old Kian Guerreiro began sleeping more than usual, his family just thought he was going through the normal stages of puberty. But when he woke up one morning with a swollen elbow, his ...