Sorry but it's untrue. The estimate is one infected person will infect 10 other people --and thats a low estimate according to Johns Hopkins and the CDC.
At the first sign of ANY outbreak of smallpox, I say we drop the first corpse by air, into Kabul. Paybacks are hell.
FWIW, my opinion, I think the first sign of an outbreak would cause a temporary halt to all interstate commerce and all international border crossings. That means all the food in the grocery stores will be gone in 24 hours and all the gas at the stations will be gone as quick.
There will be a quarantine of affected areas like this country has never seen before.