My supervisor when I was working at Johns Hopkins was a Russian literature professor and was only a defense away from her PhD but both her advisors died and she ended up in healthcare. She got her MSPH at Hopkins and is well known in our field. Her history and literature background is what helped get my department grants because grant writing and editing came easy. Don't worry, all the skills you've acquired will help. Articulating how your skills can work in the health arena is really all you'll need given everything else you've posted.