"plummeted"? S&P 500 is down half a percent for the last 30 days and up 12% for the last 6 months.
The last few days have been much more rapid.
Here's the chart I have for the last 1 year, and you can definitely spot the recent trend.
Death rate so far seems well under that for auto collisions.
According to this source, "Nearly 1.25 million people die in road crashes each year." That comes out to approximately 0.017% of the global population per year. By contrast, unless I the sources I provided are seriously incorrect, the coronavirus could kill between 0.78% to 2.0% of the global population. That's nearly two orders of magnitude of a difference.
Think through actual scenarios and how your behaviors might actually influence them, rather than just making you feel somewhat less guilty about it.
The point of my shortform wasn't that we can do something right now to reduce the risk massively. It was that people seem irrationally poised to dismiss a potential disaster. This is plausibly bad if this behavior shows up in future catastrophes that kill eg. billions of people.