Before 1990, there had never been a documented case of a patient getting HIV from a health care worker. Kimberly Bergalis changed that. Her claim that she’d been infected by her dentist would captivate and terrify the country. And the dentist, David Acer, would be made into a villain without America ever knowing who he really was. This episode was written by Kelly Jones and Josh Levin, One Year’s editorial director. One Year’s senior producer is Evan Chung. This episode was produced by Kelly Jones and Evan Chung, with additional production by Olivia Briley.  It was edited by Joel Meyer and Derek John, Slate’s executive producer of narrative podcasts. Merritt Jacob is senior technical director. We had mixing help from Kevin Bendis. We had production help this season from Jabari Butler. Join Slate Plus to get a special behind-the-scenes conversation at the end of our season about how we put together our 1990 stories. Slate Plus members also get to listen to all Slate podcasts without any ads. Learn more about your ad choices. Visit megaphone.fm/adchoices