American medical research and medical quality are world-famous, but there are many differences between the medical education system and other countries. First of all, you must study undergraduate before you can study medicine in the United States. There is basically no medical-related undergraduate degree in the United States, which is different from other countries, because many students in other countries can start studying medicine after graduating from high school.

In the United States, you need to graduate from college, apply for medical school, and then study medicine for four years. When you graduate from medical school, you only get a medical diploma. You must complete the medical training that can only be completed during your residency to become a real doctor.

When you are a resident, you need to choose a major, such as internal medicine or surgery. The training period of residents generally ranges from 3 years (internal medicine and pediatrics) to more than 7 years (neurosurgery).

So in the United States, the income of doctors is one of the highest in all occupations.