Nature had a nice graphic showing the different approaches being taken: <a href="https://www.nature.com/articles/d41586-020-01221-y" rel="nofollow">https://www.nature.com/articles/d41586-020-01221-y</a>
Twelve candidates in clinical trials according to the table. That sounds like a lot, but I have no idea how that number compares to other vaccines. Is this a typical number, or is it high/low?
Given the ages and health conditions of the dead, what is the chance that a vaccine will do any good to them? Remember that the flu vaccine is of very dubious effectiveness on those aged 65+.<p>Of course, vaccinating the whole population might render those groups less likely to be infected (because of herd immunity) but still, it will involve vaccinating populations which have little risk from the disease with a vaccine that has been fast-tracked through the approval process.<p>This situation is a disaster.