Final answer:
Epidemiologists typically have a master's degree in public health after their bachelor's degree, and the MPH program usually lasts about two years. Some may also have medical degrees or a Ph.D. in related fields.
Step-by-step explanation:
Epidemiologists are public health professionals who typically have a graduate-level education. After completing a baccalaureate degree in environmental health, individuals applying to the Environmental Health Officer (EHO) Intensive Practice Program (IPP) will pursue a master's degree in public health (MPH). The duration of the MPH program can vary, but it generally lasts about two years if attended full-time. Some epidemiologists also further their education by becoming physicians with an M.D. or a D.O degree, or they delve into research by earning a Ph.D. in a related field like biology or microbiology.