Read the entire manual on public health emergency response. This manual describes a potential cohesive complete public health response to a public health disaster. Not all aspects will be used in all responses. Much like ICS it can be scaled as appropriate.
Find one example of a public health emergency in the United States in the last 20 years and develop no more than 10 PowerPoint slides about the incident: What happened, who responded, what public health measures were involved and how did the situation resolve itself? Use the topics presented in the manual to shape your presentation.
I expect that you will be able to cite specific details and page numbers from this manual to support how the incident was mitigated.
