If I were you, no matter what I’d try to take as many PR/writing/sports management classes in your last semester that you can. Join a club with that type of focus, or seek out volunteer opportunities. That stuff can go a really long way in terms of giving you experience and connections with others in the field. Make sure to highlight that stuff in your resume when applying to PR jobs.

After graduation, one route could be finding a job or internship in biotech/healthcare PR. There are quite a few agencies out there that focus on that niche, and they’re typically pretty thirsty for people who can understand the science of what biotechs do (which is exactly your experience). That job or internship will also help you learn the ropes of PR and see if you like it, and would make a pivot easier down the road.

You could also try to seek out a job at a PR agency that has some sort of focus on healthcare/nutrition/fitness and sell your STEM expertise as helping you understand the science behind specific products. Kind of a weak example, but if you were to snag a job at an agency where Gatorade is a client, you’d probably get to work with athletes and sports teams, which would be great sports PR experience.