So here's something to think about. There has never been a vaccine for any coronavirus, not one, ever. Covid 19 comes along, supposedly more infectious, more deadly, more complicated, more of everything and a couple months in we already have very promising results working towards a vaccine. My bullshit meter is off the chart. Now either these people have never put much effort into previous vaccine research, or this one ain't all that complicated. Yeah they're working hard at it, all hands on deck, but com'on, never ever been able to concoct one and now we're on the cusp of one in a matter of weeks? There is another possibility, these phase one trials are easy peasy to get through and then failures result as they get further along. Just food for thought as I don't believe in all too convenient miracles.
mass producing a vaccine is big money. Only other corona viruses we've dealt with were MERS, SARS, and some cold rhino viruses. The 1st two never spread to the point were developing a vaccine made financial sense, the latter were never a big issue.