1.？ Public health expert: responsible for planning, implementing and supervising public health projects, such as vaccination, epidemic control and disease prevention activities.
2.？ Medical researcher: studies the cause, development and treatment of diseases, and participates in laboratory experiments and clinical trials.
3.？ Medical representatives: introduce and sell medicines, medical equipment and services to doctors and pharmaceutical companies.
4.？ Medical management personnel: responsible for the management and coordination of medical institutions.
5.？ Health education expert: responsible for providing health knowledge and publicity, promoting public health and preventing diseases.
6.？ International aid workers: Participate in international aid projects and provide medical and health services for developing countries.
7.？ Disease epidemiologist: studies the epidemic situation and transmission mode of diseases and is responsible for formulating control and prevention measures.