“just to be clear, even if they found a vaccine worked Tommorow, you have to have extensive human trials. Do we want another thalidomide scandal? There is zero chance of a vaccine this year, and only a remote chance of one in 2021.”
If that is true we will all have been exposed long before we get a vaccine, so the vaccine will be no use, this is a very infectious pandemic, all we can do is treat symptoms. In the U.K. it is already causing high mortality in care homes for the elderly, most younger patients do have a good resistance or some immunity. At some point the economy has to return to work, how soon international travel is possible is very uncertain because each nation will have its own restrictions.