Would it be bad if my app had two focused interests in terms of ec’s for example neuroscience/med/surgery and environmental science/environmental health.
It’s not bad at all to have two or more different interests in ECs. In fact, it used to be an advantage to be “well-rounded”, by playing a varsity sport, leading a club or paper, or student council, and playing in the band. Just list the things you do, and tell why you enjoy doing them.
A “spike” is extraordinary achievement in a particular area, that distinguishes you in the application process. Something like winning major awards at the state, national, or international level. It’s very unusual for someone to have achieved at that extremely high level in more than one area; such as winning a national music competition and winning a national math competition (although there are applicants who have done this).
Here’s an example of a program which values both of your interests:
https://www.esf.edu/upstate/academics/
Note the last paragraph before questions: “One of the goals of the programs is to encourage diversity and to provide pathways to medical school for students from a variety of different academic backgrounds. As a result, students applying to the UAS are encouraged to consider majors outside of biomedical sciences . . .”
More and more, medical schools are looking for applicants who are from outside of the traditional pre-med route.
Another path to consider is the MD/PhD route. Medical researchers are problem solvers and the more different perspectives from which researchers are looking at problems, the better and more varied are the likely solutions that will emerge. Surprisingly, the MD/PhD is often much cheaper or even free vs med school which is very costly and which typically leaves young doctors with massive debt. For example:
https://www.urmc.rochester.edu/education/md-phd.asps
I recently came across an interesting example of solving a problem from a different perspective. Instead of the classic approach to hearing loss of providing amplification at different frequencies via hearing aids, brain researchers have developed a bracelet which sends stimuli through the skin to the brain when certain high frequency speech sounds are detected to signal to the brain what the sound is. High frequency loss is the most common loss and is the most critical in distinguishing between words which sound alike. It works!