On 5/9/08, Florence Devouard <fdevouard@wikimedia.org> wrote:

Which means generally, do not buy food in little shops around the corner
with no refrigeration system. Avoid eating raw vegetable and fruit.
Drink preferably bottle water (or coca cola, fanta, or tea, or coffee
etc...), not plain water from the tap. All recommandations which are
general everywhere in Africa anyway... and very often good
recommandations to follow anytime you travel somewhere only because of
different microflora.

Anthere
 
These recommendations go for anywhere.  My tap water in the US (Washington, DC) is not suitable for drinking or even use in cooking because it contains high levels of lead, and sometimes is discolored. 
 
As for the original post, vaccines are not required, but it's recommended to be vaccinated for Hepatitis A and Hepatits B and other routine vaccinations.  These are recommended anyway, if you travel or not. - http://wwwn.cdc.gov/travel/destinationEgypt.aspx
 
-Aude

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Aude