Final answer:
The correct statement is that immunization registries compile immunizations from a variety of healthcare providers, supporting public health by aiding in disease prevention through herd immunity.
Step-by-step explanation:
The correct statement about immunization registries is that they compile immunizations from a variety of healthcare providers. Immunization registries serve to collect and consolidate vaccination data across different healthcare settings to assist in public health efforts and ensure individuals are up-to-date with their immunizations. This allows healthcare providers and public health officials to monitor immunization levels, which contributes to the control of communicable diseases through herd immunity and supports the goal of reducing incidence of vaccine-preventable diseases as outlined in public health policies, including Healthy People 2020.