3 ms·
It might be that airborne transport imposes barriers that smallpox didn't evolve to meet. Perhaps something like resistance to degradation by UV in sunlight. I
by ridgeguy 9y ago
It might be that airborne transport imposes barriers that smallpox didn't evolve to meet. Perhaps something like resistance to degradation by UV in sunlight.
If so, maybe the apparently large cohort of viruses that do survive airborne dispersal is only a small fraction of the actual virus inventory on our planet.