Global and Public health Sciences major at CALS

Hi so I wrote my why major essay mainly about my interest in microbiology as well as mentioning faculty within the department of molecular biology. However, I looked up the major “global and public health sciences” on their website and it sounded pretty interesting. Now I am considering choosing that major over biological sciences. My question is would I have to completely rewrite my essay if i choose that? Most of my ECs are lab research including a clinic shadowing program.