China's massive travel restrictions, house-to-house checks, huge isolation wards and lockdowns of entire cities bought the world valuable time to prepare for the global spread of the new virus. But with troubling outbreaks now emerging in Italy, South Korea and Iran, and U.S. health officials warning Tuesday it's inevitable it will spread more widely in America, the question is: Did the world use that time wisely and is it ready for a potential pandemic? “It’s not so much a question of if this will happen anymore, but rather more a question of exactly when this will happen — and how many people in this country will have severe illness,” said Dr.