Is this best for working in the 3rd world?

Hello. I am currenty a pre-nursing student. I am interested in working in a 3rd world country. (I have worked as a CNA in Swaziland for 6 months) I think it makes sense for me to get into Infectious Disease Nursing. I know little about it though, so I have a few questions. Do you think this is a good area to specialize in for working in Africa? What do I need to do to become specialized? Are there special courses to study?

Thank you in advance,

EJM