RE: Sure they will. Without a host, a virus has nowhere to spread. But, that’s the key. As long as you keep spreading it, it will be just like the Energizer bunny. Until of course, it runs out of hosts.
How did the first SARS-COV-1 and H1N1 fizzle out? These viruses are still out there and there were no vaccines for these.
How many people have they killed this year? Serious question - I'm curious.
Bingo. Viruses "run out of steam" and weaken over time, just like H1N1 did. They become non-events.