Questions about health

One in twenty questions for Google concern health issues. "So starting in the next few days, when you ask Google about common health conditions, you’ll start getting relevant medical facts right up front from the Knowledge Graph. We’ll show you typical symptoms and treatments, as well as details on how common the condition is—whether it’s critical, if it’s contagious, what ages it affects, and more."  http://googleblog.blogspot.co.uk/2015/02/health-info-knowledge-graph.html

“We worked with a team of medical doctors (led by our own Dr. Kapil Parakh, M.D., MPH, Ph.D.) to carefully compile, curate, and review this information. All of the gathered facts represent real-life clinical knowledge from these doctors and high-quality medical sources across the web, and the information has been checked by medical doctors at Google and the Mayo Clinic for accuracy.”