(BEIJING) — A new viral illness being watched with a wary eye around the globe accelerated its spread in China on Sunday with 56 deaths so far, while the U.S. Consulate in the city at the epicenter announced it will evacuate its personnel and some private citizens aboard a charter flight. China’s health minister said the country was entering a “crucial stage” as “it seems like the ability of the virus to spread is getting stronger.” Ma Xiaowei declined to estimate how long it would take to bring the situation under control, but said travel restrictions and other strict measures should bring results “at the lowest cost and fastest speed.” President Xi Jinping on Saturday called the outbreak a grave situation and said the government was stepping up efforts to restrict travel and public gatherings while rushing medical staff and supplies to the city at the center of the crisis, Wuhan, which remains on lockdown with no flights, trains or buses in or out. The epidemic has revived memories of the SARS outbreak that originated in China and killed nearly 800 as it spread around the world in 2002 and 2003.