I think you're hitting a wall in your doctoral studies. You would not be the first to get 'stuck'.
Laziness and impatience are so common that I wouldn't dwell on attributing it to your virus.
You should monitor your liver health closely, however, especially if you decide to wait to treat.
Good luck on persevering with your degree. Keep on truckin'.
I should have gone on for the PHD but quit with the MS because I was just burned out and wanted to go to a 9-5 life instead of an always-on student's life. Part of your reaction may be burn-out but if your illness is affecting you, just the added fatigue will make it harder to concentrate.
If you are in treatment, that's a whole nother story. The meds make it harder to concentrate & make you exhausted. Antidepressants make very vivid dreams that you wouldn't normally encounter. Stay in your program if you can bear to. It's harder to go back later and finish. You don't have to be valedictorian, you just have to satisfy your committee.