How often does the CDC work to protect public health?

The correct answer is based on the comprehensive and continuous nature of the Centers for Disease Control and Prevention's (CDC) work in public health. The CDC operates 24/7 to monitor, prevent, and respond to public health threats. This round-the-clock commitment ensures that they are always prepared to deal with emergencies, manage outbreaks, conduct research, and implement health interventions effectively, regardless of the time or day. Such vigilance is crucial in a rapidly changing health landscape, where new diseases can emerge and require immediate action.

In contrast, the other choices imply a limited operation scope. Only working during outbreaks would leave a gap in preparation and response capabilities, which is not feasible given the unpredictability of health crises. The notion of only working regularly during the year does not encompass the need for constant surveillance and preparedness outside of scheduled times. Similarly, being available only on weekdays would hinder timely responses to urgent health issues that may arise at any moment, especially during weekends or holidays. Therefore, the CDC's 24/7 operational structure underscores its vital role in safeguarding public health consistently.