The problem is not vaccine development - the bottleneck is TESTING. The vaccine itself can be developed in literally DAYS (for most viruses). The problem is

The problem is not vaccine development - the bottleneck is TESTING. The vaccine itself can be developed in literally DAYS (for most viruses). The problem is that it takes a YEAR to test it comfortably in humans. For something that you'll be delivering to otherwise healthy humans, the bar for safety is extremely high. ...now the modern counter-argument is that if 4% of people are going to die globally, then maybe the safety bar should not be so high (this time).