A lot of papers and clinical trial results are posted there. And given the technical nature of the content a lot of people in the medical field hang out there and comment. Much of it is a bit over my head, but it's a good for learning.

For a sample, here are a couple of posts there today: https://www.nature.com/articles/s41564-020-00835-2 Therapeutically administered ribonucleoside analogue MK-4482/EIDD-2801 blocks SARS-CoV-2 transmission in ferrets

https://blogs.sciencemag.org/pipeline/archives/2020/12/04/ge... Get Ready for False Side Effects

Heads up, r/covid19 isn't r/Coronavirus, the latter being pretty vapid & sensational