The document outlines the 10 steps of conducting an outbreak investigation: 1) determine existence of outbreak, 2) confirm diagnosis, 3) define cases, 4) search for cases, 5) generate hypotheses, 6) test hypotheses, 7) draw conclusions, 8) compare to facts, 9) communicate findings, and 10) execute prevention measures. Key steps include defining a case, systematically searching for cases, analyzing descriptive findings to generate hypotheses, testing hypotheses through analytical studies to identify the source, communicating conclusions, and implementing control measures to prevent future outbreaks.