A few things to note:
1) Look for the most updated information (i.e., medical information should always be as current as possible).
2) The different aspects of the disease may not be found in one source, so search in multiple sources (e.g., MedlinePlus.gov, books, databases) to find the information needed for the presentation.
3) Double-check accuracy of references in APA Style, 7th edition before submitting presentation.
4) Please ask questions, when in doubt.