Veteran Chinese AIDS campaigner Doctor Gao Yaojie, right, talks with students about AIDS prevention during a series of university lectures in Shanghai, Nov. 30 2006. Mark Ralston/AFP via Getty Images hide caption

If your ailing kiddo can jump without too much pain or complaint, it's a good sign they have a garden-variety tummy ache — not appendicitis. Jamie Grill/Getty Images hide caption

Esther Lau testifies on June 20 before the California Senate Judiciary Committee in support of Assemblywoman Wendy Carrillo's bill allowing teens with Medi-Cal coverage to seek therapy without parental approval. Senate of the State of California hide caption