When I think about how many scientific discoveries have been made in my lifetime, not to mention how many things we have learned since Gutenberg made the first printing press I am not surprised we are learning new things everyday about Covid, especially considering how many people are working on it with so many resources. If we were not learning new things and things were not changing I would be more scared because we would be screwed. What has changed since I was a kids and AIDS was the big thing and Gutenberg printed the first bible is how information is shared. I think it is good that we are learning new things everyday.
Things change, that is the nature of life.