The CDC document "How to make oral rehydration solution (ORS)" provides clear, step-by-step instructions for preparing and using ORS to treat dehydration caused by diarrhea. It emphasizes the importance of using clean water, salt, and sugar in precise proportions to create the solution. The document is particularly relevant in emergency settings, such as during cholera outbreaks or in areas with limited medical resources, like Haiti. It highlights the effectiveness of ORS in saving lives by rehydrating individuals suffering from severe diarrhea and encourages its use as a simple, accessible treatment method.