* Epidemiologists: They are specialists in the study of the distribution and determinants of health-related states or events in specified populations, and the application of this study to the control of health problems.

* Infectious Disease Specialists: These doctors focus on the diagnosis, treatment, and prevention of infectious diseases.

* Public Health Professionals: This broad category includes individuals working in various fields like environmental health, health education, and health policy, all of whom contribute to understanding and addressing health issues on a community level.

* Virologists/Bacteriologists: These scientists study the specific viruses or bacteria causing the epidemic.

Other professionals who might be involved in studying the causes of an epidemic:

* Statisticians: They analyze data to identify trends and patterns related to the epidemic.

* Geneticists: They study the genetic factors that might contribute to the spread or severity of the disease.

* Immunologists: They study the immune system and how it responds to the disease.

* Social Scientists: They study the social factors that influence the spread and impact of the epidemic.

Important Note: These professionals often collaborate to understand the complex causes of an epidemic and develop effective prevention and control strategies.