[SkyMarshal]

I am not a medical or public health professional, but my understanding from various medical podcasts [1] and reporting is, the source of the epidemic is over-prescription of opioids as a cure-all, even for non-physical pain and psychological maladies like anxiety. Similar to over prescription of antibiotics, except that opioids are addictive.

China didn’t cause this, we did, but there are suppliers in China cashing in on it. But so are other suppliers in the US and elsewhere.

[1]: http://freakonomics.com/podcast/opioids-part-1/

[1]:https://sph.umich.edu/podcast/season1/opioids.html

[datashow]

Not really that simple, medicine supply can change doctors' behavior. And massive amount of fentanyl are illegally smuggled into the US. You can't simply pick a middle point in the chain of events and claim that point is the cause.