Reason to act now
“If a pandemic happens, 40% to 70% of people world-wide are likely to be infected in the coming year."
This is just speculation IF there is a pandemic. But it is realistic enough to motivate national stockpiling pretty quickly.
I saw the quote on the internet. Taken from an article in the NewScientist. (That I did not track down further, so I can't attest to its accuracy or likelihood).