Final answer:
Epidemiologists in public health collect data, track disease spread, and identify transmission modes. They work with historians, gather information, develop strategies, and design policies to reduce disease incidence and prevent its spread. They also conduct rapid investigations during outbreaks.
Step-by-step explanation:
Epidemiologists are public health professionals who collect data, track the spread of diseases, and identify the original mode of transmission. They work in collaboration with historians to understand how diseases have evolved geographically and over time. Epidemiologists gather information from clinical records, patient interviews, and other sources to develop strategies, such as vaccinations, and design public health policies to reduce the incidence of diseases and prevent their spread. They also conduct rapid investigations during outbreaks to recommend immediate measures for control.