Lots of debate about whether we can find a vaccine.
An equally important question - maybe even more important - is whether we can find a treatment.
It's a bit of a mystery as to why it kills some people - on accession even young, fit and healthy people - and yet for others they get mild symptoms.
If we can figure that out, and develop a treatment such that if you catch this, you pop down to the docs and he/she says "take 2 of these tablets 3 times a day and come back in a fortnight if it's not cleared up" - then it won't matter whether we have a vaccine if not.
If we can get to a situation where it's no more deadly than flu, then we can get back to normal, vaccine or no vaccine.