This article (from IndyStar which can’t be posted here) has more information.
http://www.indystar.com/story/news/politics/2015/03/25/gov-pence-visit-indiana-county-hiv-outbreak/70427432/
In a county of 25000 people, there have been 79 new HIV cases linked to drug use diagnosed since the beginning of 2015. There are usually 5 per year.
http://wishtv.com/2014/05/15/heroin-spike-putting-new-neighborhoods-at-risk/