Which intervention is most appropriate for preventing the spread of pandemic influenza in disaster management?

The most appropriate intervention for preventing the spread of pandemic influenza in disaster management is the distribution of antiviral agents to clients. Antiviral medications are effective in reducing the severity and duration of influenza symptoms, and they can play a critical role in controlling outbreaks. When a pandemic occurs, timely access to these medications can help to reduce transmission rates, decrease the burden of illness, and ultimately save lives.

In the context of disaster management, implementing measures that directly address the infectious nature of the virus is essential. Antiviral agents can be used for prophylaxis in high-risk groups and for treatment during an outbreak, making them a key component of a public health response aimed at containing and mitigating the impact of pandemic influenza.

Other options, like promoting daily exercise or encouraging group gatherings, do not directly address the transmission of the virus and could, in fact, contribute to increased spread. Limiting water intake is also irrelevant to preventing influenza, as hydration does not affect viral transmission or infection control. Thus, distributing antiviral agents is the most targeted approach to effectively manage and reduce the spread of influenza during a pandemic.