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Empathy in an epidemic

Every day, 91 people overdose on opioids. Opioid addiction has become an epidemic. Why is it such a big problem? And what can we do to help?

References

Cdc.gov: https://www.cdc.gov/drugoverdose/ 
Purves et al., 2001: https://www.ncbi.nlm.nih.gov/books/NBK10957/ 
Boecker et al., 2008: https://academic.oup.com/cercor/article/18/11/2523/291108/The-Runner-s-High-Opioidergic-Mechanisms-in-the
Drugabuse.gov: https://www.drugabuse.gov/drugs-abuse/opioids
Scheve, 2009: http://science.howstuffworks.com/life/endorphins1.htm
Stein, 2016: http://www.annualreviews.org/doi/abs/10.1146/annurev-med-062613-093100
Mattick et al., 2014: https://www.ncbi.nlm.nih.gov/pubmed/24500948

Music: http://freemusicarchive.org/music/Loch_Lomond/Pens_From_Spain_Instrumentals/Pens_From_Spain_Instrumental