Which organization is focused on improving public health in the United States?

The Centers for Disease Control and Prevention (CDC) is the correct choice because it is a national public health institute in the United States that focuses specifically on protecting public health and safety through the control and prevention of disease, injury, and disability. The CDC conducts research and provides information on health and safety issues, implements disease prevention strategies, and addresses public health emergencies. Its mission is to ensure conditions in which people can be healthy, such as monitoring health trends, responding to outbreaks, and promoting health through education and collaboration with other organizations and health departments.

In contrast, the World Health Organization (WHO) operates globally, coordinating international health responses and setting health standards, which is broader than just public health in the U.S. The National Institutes of Health (NIH) primarily focus on biomedical research and funding research aimed at improving health rather than direct public health initiatives. The Food and Drug Administration (FDA) regulates food safety, pharmaceuticals, and medical devices, ensuring products are safe and effective, but its primary focus is not on public health improvement in the same proactive manner as the CDC.