Someone please correct me if I'm wrong, but the latest I had heard was that _pre-symptomatic_ spread was the issue rather than asysmptomatic. As in, if you got covid but never developed symptoms, you likely never had enough viral load to transmit the virus. If you later showed symptoms then you likely had a high viral load between contraction and showing symptoms and were likely to transmit the virus. So if this stops the symptoms, it may also stop the viral load from reaching transmitable levels.
Yeah, that's my understanding as well. There's a period of time between when you initially get it and when you start showing symptoms (4-5 days is the number I've heard) where you are contagious but most likely don't know it. That's why Covid is particularly nasty, because it spreads before it shows symptoms.
