This is a long shot but as I never cease to be delighted with the knowledge and expertise foodlovers members have I thought I would try here.
A friend of mine from USA is flying there within two weeks regarding his business. When I said "be careful" to him, he asked what did I know about the area. What I do know I only know from news reports and travel blogs.
I know he has travelled before and goes through a travel agent. UK, India and Germany, being among some places he has been to.
I suggested he immediately check whether he would need any special vaccinations and also for the other safety aspects. I suggested he should check out the Nigerian Consulate or Embasssy in USA for any information.
If anyone has first hand knowledge I would be happy to pass it on to him.