Preventive medicine is often said to be a public health major, including epidemiology, nutrition, social medicine and other majors. It mainly works in centers for disease control and prevention, epidemic prevention stations and other places, and it is still different from clinical medicine. It involves many statistical data analysis and experimental analysis. If you have family ties, it is easy to find a better job locally. If it doesn't matter, the employment is average and the income can't keep up.