It's unlikely Ebola could destroy civilisation, it would have to manage 80% plus across wide sectors to destroy key specialities. The plague got near with 50-70% in the feudal civilisation of 1348, but the resolution to that built in greater resilience by allowing craft specialities to appear, which have increased ever since. We also have a massive literature stock to rebuild lost skills. The biggest risk will be from disruption to a just-in-time delivery network, particularly in key continuous process plant.
And if the worst comes to the worst, our skills as acoustic instrumentalists will be in demand for many long evenings with no TV.