Final answer:
Public health surveillance evaluates a multitude of factors including genetic background, environmental conditions, human behaviors, and emerging infectious agents, contributing to the foundation of public health practices and policies.
Step-by-step explanation:
Public health surveillance is the proactive evaluation of all of the choices provided: genetic background, environmental conditions, human behaviors and lifestyle choices, and emerging infectious agents. As the cornerstone of public health, epidemiology focuses on studying disease patterns, identifying risk factors, and developing strategies to prevent and manage health threats. Epidemiology's role extends beyond tracking infectious disease epidemics to encompassing environmental factors and accidents, thereby shaping health policy and medical practices to promote population health.
Public health surveillance is the proactive evaluation of All of the choices are correct. Epidemiologists collect data about a particular disease and track its spread to identify the original mode of transmission. They also gather information from various sources to develop strategies and design public health policies to reduce the incidence of a disease or prevent its spread.