Please correct me

In my country, we do not have 'majors' in high school. We have 'favorite subjects'. Is it not the same in your country, Mahshid?

Mathematics was my major in high school and I always received excellent grades in that subject, but my passion for medicine went beyond my interest in mathematics. During medical training, I realized that epidemiology

Hi dear, thanks for corrections. As always your suggestions are great, I will make changes that you suggested in my essay. About the majors I am not sure how the system works there now but when I graduated from high school in Iran(early 90s)we had 4 different option to choose as our major; mathematics and physics, biology, economy, and art.

Sorry to bother you again but I needed to put this paragraph in the middle of my essay so I had to make a few changes , could you please review it and let me know what you think about the flow of text. Appreciate your time and promise this is the last time I make any changes to this paragraph.

That experience boosted my previous interest in public health and epidemiology. History of my interest goes back to the time when I was still in high school and mathematics was my major. I always received excellent grades in that subject, but my passion for medicine went beyond my interest in mathematics. During medical training, I realized that epidemiology and biostatistics involve mathematical

I have underlined some problem areas:

That experience boosted my previous interest in public health and epidemiology. History of my interest goes back to the time when I was still in high school and mathematics was my major. I always received excellent grades in that subject, but my passion for medicine went beyond my interest in mathematics. During medical training, I real