More shots?

It's a really good thing I'm not afraid of needles. Why? Because I have been a human pin cushion for years. All the international travel I do requires immunizations. Well, I was just informed by my new boss that I will be taking my first work trip to Africa. I'll be visiting countries I've never seen - Kenya, Mozambique, Ethiopia and Uganda. I'm really looking forward to this trip. However, it requires more shots. I now need to add yellow fever and meningitis immunizations to my list. I also feel like I'm on a steady diet of malaria pills.

Here's my question, could all of these immunizations and pills actually be good for me? I've reached a point that I wonder if my polio vaccine could have a strange reaction to my typhoid vaccine. Is that possible? It also can't be good to injest that much malaria disease, even if it is in vaccine form. People who live overseas long-term just stop taking the pills because the side effects are worse than the sickness. Things that make you go hmmm...I should be studied.