Edit 1: seriously guys. Maybe look up "long COVID" before giving such comments. I appreciate your thoughts but this claim that it's been 20 days and this or that are super vague and unscientific.
Edit 2: Also look up Covid brain fog if you aren't aware of it.
COVID diagnosis often takes a while, and the results might initially be negative even while one is already clearly suffering. And one of the less known affects of COVID is the occurrence of severe effects on cognitive abilities, including speech/language. Without going into details, I just wanted to put this out here after the news of Biden testing positive for COVID. Unfortunately, this may sometimes be long term, but it's not so necessarily. I have seen it to happen with a popular professor at my college, who faced significant issues with a cloudy memory for months, which have lingered on further for years at a lesser magnitude. Hopefully, Biden would do better quickly, with the access to the best healthcare out there.