It's tragic that only the threat of a deadly disease could compel such a change, but perhaps we may find other levers to help us achieve such widespread beneficial changes in the future?
A total shutdown of the entire world economy on an unprecedented scale still doesn't track enough to prevent climate change.
If that isn't a clear indicator of how severe the situation is then I don't know what else is.
I'm still optimistic. Just replacing coal with renewable power would put emission levels back to like the 1960s (maybe 1970s, trying to find that damn statistic), and that's likely to happen in the US in a few decades just by market forces.