I would have to get my masters to get a career in those fields but is it attainable to do so with a life science BSc. I only see the global health specialization with the Health Sciences program but is there anything with life science to go in a similar direction. Help me please and thank you

I'm pretty sure Western's Health Science is Global+Public Health. And I'm pretty sure you can go to Global/Public Heath Masters programs with any sort of biological science degree

edit: Just looked at McMasters Global Health MSc program and you can get in with any type of Bachelors.