The number needed to treat is know as NNT

The number needed to treat (NNT) is an epidemiological measure used in communicating the effectiveness of a health-care intervention, typically a treatment with medication. The NNT is the average number of patients who need to be treated to prevent one additional bad outcome (e.g. the number of patients that need to be treated for one to benefit compared with a control in a clinical trial). It is defined as the inverse of the absolute risk reduction.

What would be the best way to get a world NNT day on the December 14.
I was inspired to suggest that Dec the 14th should be the day after watching the video below   .It is the date  George Washington died at home around 10 p.m. on Saturday, December 14, 1799, aged 67. In his journal, Lear recorded Washington’s last words as being “‘Tis well.”

Fudging the Stats: Drug Companies and the “Number Needed to Treat”