You should strongly consider finding a travel medicine clinic near where you live so that you can sit down with a medical provider and discuss your
itinerary, required vaccinations, recommended medications to take with you (for example, antibiotics for traveler's diarrhea), food and water precautions, road safety, etc.
Travel clinic locations:
http://wwwn.cdc.gov/travel/contentTravelClinics.aspx
Other links:
http://www.mdtravelhealth.com/destinations/africa/egypt.php
http://wwwn.cdc.