Final answer:
Health care workers at the therapist level typically require a master's degree or a doctorate. Physical therapists and psychologists need advanced degrees for practice, whereas epidemiologists generally need a bachelor's and a master's degree in public health.
Step-by-step explanation:
Most health care workers at the therapist level have a minimum of either a master's degree or a doctorate degree. For instance, physical therapists (PTs) often require a master's degree or a doctorate due to their extensive training in body mechanics and specialization in areas like sports injuries. Similarly, to become a practicing psychologist at a 4-year institution or in many specialty areas, one typically requires a doctoral degree in psychology. A master's degree alone, however, may be sufficient for careers such as professional counseling, school psychology, sport psychology consulting, or industrial organizational psychology.
Epidemiologists typically have a bachelor's degree, followed by a master's degree in Public Health (MPH); some also have an M.D., D.O., or a Ph.D. in related fields. Other careers in healthcare such as athletic trainers usually require a degree from an accredited program, with coursework in the basic sciences, demonstrating the diversity in educational requirements within healthcare professions.