China's changed how it counts virus cases three times now. Here's why CNNUS prepares for possible coronavirus pandemic, WHO officials say Iran outbreak 'worrisome' CNBCCoronavirus Live Updates: Cases in Wuhan Nursing Home Raise Alarm The New York TimesCoronavirus: South Korea, global spike as South Korea says time limited - Business Insider Business InsiderChina’s Hubei to add virus cases back to tally after methodology change ReutersView Full Coverage on Google News