I have a good friend who goes to Africa twice a year (medical research) and she recommends the CDC site as well. If nothing else, go to the site, print out the page that counts for you, and take it to your physician.
Also, if you have any over-the-counter drugs be sure to take those with you (Claritin, Pepto-Bismol, etc) as you most likely won't see them in Africa.
Malaria is your main concern. Get the shots and take the pills.
Check out the State Department "warning" list for Africa as well - sometimes you can fun afoul of local customs, like being charged a $40 "tax" at the airport before being allowed to leave.
From what she tells me, Africa is one confusing place. She just emailed me this morning to say that the hotel she's staying at in Uganda doesn't have any news channels on the cable TV, but does carry the Golf Channel (!!!!!) so she's been listening to campaign news on Voice of America and the BBC. Take a portable shortwave radio if you have one, the vast majority of Africans still get their news this way.
Ken Strayhorn
Hillsborough NC