In this Tuesday, March 1, 2016, photograph, Dr. Josh Blum demonstrates how to administer a dose of naloxone while conferring with the inmate at the Denver County Jail in downtown Denver. Jails and correction agencies across the country such as Denver are teaching soon-to-be-released inmates how to use the heroin overdose antidote called naloxone, either to save others and sometimes themselves. (AP Photo/David Zalubowski) ** FILE **
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