In America it’s an epidemic. Now new evidence raises concern about the UK’s use of prescription opioids. Michael Mosley goes on an immersive journey to ask what can be done about it. 　　The opioid epidemic has devastated America. But what’s the situation here? A new report from Public Health England raises serious concerns about Britain's own relationship with painkillers. Dr Mich... (展開(kāi)全部)