I do think that their will be a need for more entomologists and epidemiologist in the future. The larger question is will governments be willing to properly fund health, especially for the control and treatment of zoonotic diseases. While all of the world needs more scientists trained in entomology, epidemiology, AND microbiology/parasitology (and especially combinations of these), if the predicted large increase in the population of Africa occurs over the next 20 years I would predict a huge increase in the need and number of jobs created.
On My opinion, in an African setting, we need more entomologist in place than we could for others. But the major crisis is on funding for proper training and government commitments on health related issues.
The diseases which were closely to control and subsequently eradication are now bouncing back for lack of expertise and reliable human resource on medical entomologists.
While I agree completely with Dr. Kweka's comments I also want to remind everyone that this is the same problem for every country, even the U.S. We currently have a national Congress that cannot seem to act for the good of the U.S. and the World as we face the Zika Virus. The Senate passed a good bill finally, but the House of Representatives seems unable to act.sensibly. It appears the efforts of NGO's and other non-profits are going to need to plug some of the holes, but they do not have enough resources to do what is necessary.