It's been a full month since the last one of these updates, which clearly can't be good news:
After early BP Morneau said nothing new to report. He still hasn't had a day where he's symptom free #twins
Morneau hasn't played in a game since July 7th, and the fact that he still hasn't had a symptom-free day suggests that it would be impossible to give a timetable for his return. He has recently intensified his workouts in an effort to get into game-playing shape, but it appears his head doesn't want to cooperate.
Morneau could conceivably return next week, or next month, or next season. There's just no way to know.