The Rule of Forty Thousand:

If something leads to about 40,000 US deaths per year, little attention is paid to it even if those deaths are preventable.

But a lot more than than 40,000 gets attention, and so does a lot less.

That's why there's very little press coverage about influenza, guns, traffic accidents, or suicide--because each of those kill about 40,000. If the deaths go much higher than 40,000 (e.g. cancer or alzheimer's) or much lower (e.g. a kid left in a hot car) it gets lots of coverage.

Yep, The Rule of 40,000. You heard it here first, folks.