Mea culpa. That was the original title I submitted. When no one had responded for a good while, I inserted the "99.4% effective" part. I should have at least wr

Mea culpa. That was the original title I submitted. When no one had responded for a good while, I inserted the "99.4% effective" part. I should have at least wrapped it [in brackets]. I hadn't intended to drop the question mark.