Of course there will be a “new normal”, and an increased awareness and practice of good hygiene will be part of it. I hope we don’t go to too much of an extreme though. I’m not a health care professional or biologist, but my understanding is that the human immune system “learns” from exposure to different things in the environment and mounts defenses against pathogens it sees that we aren’t even aware of. For example, before the pandemic, many health care professionals were discouraging casual use of hand sanitizer or “antibacterial” soaps.