by Maria DANILOVA Agence France Presse Makayla Cox, a high school student in the US state of Virginia, thought she was taking medication that her friend had procured to treat pain and anxiety. Instead, the pill she took two weeks after her sixteenth birthday was fentanyl, a synthetic opioid 50 times more potent than heroin. It killed her almost instantly. After watching a movie — a prequel to “Harry Potter” — with her mother Shannon […]