I haven't read the full study, so I don't know whether those have been addressed, but judging from the summary, it may not have been a consideration. I've heard

I haven't read the full study, so I don't know whether those have been addressed, but judging from the summary, it may not have been a consideration. I've heard of a few other studies recently where this was completely overlooked; they pick patients who are the most severe and give them the drugs. Antiviral drugs won't reverse damage that's already done.