https://www.politifact.com/factchecks/2021/dec/08/facebook-p...
I personally credit the prediction attributed to Luc Montagnier back in 2020 that because COVID exhibited unnatural characteristics that exacerbated the severity of illness, he predicted that over time the characteristics would evolve out of the virus and result in a more benign illness. This is a reason why it would have been useful to have a scientific debate over the lab leak theory, because the origin of the virus informs our best guess of the path it may take in the future, which has so far confirmed to this prediction.
HIV is an interesting case because it is "just a flu" for a few weeks, then remains contagious but isn't severe at all, until it develops into AIDS years later.
Thank you politifact.com political fact check fact check for checking that.