Study of the Whisper phenomenon shows that it isn’t a viral infection. Travel bans are lifted, and life in Sol returns to what would be the new, post-Whisper normal. The beginning of the end of the whisper recession, though echoes linger even as long as 600 AE.
Reference: Suggested by Mars/Ganymede histories, HSD 2.0
Date Notes: Uncertain, likely not a clear-cut date