There is no guarantee of that at all. Many diseases get worse over time https://www.politifact.com/factchecks/2021/dec/08/facebook-posts/viruses-and-other-path

There is no guarantee of that at all. Many diseases get worse over time https://www.politifact.com/factchecks/2021/dec/08/facebook-posts/viruses-and-other-pathogens-can-evolve-become-more/ https://www.politifact.com/factchecks/2021/dec/08/facebook-p...