January 1: Market in Wuhan where outbreak is believed to have originated closed for disinfection

January 8: Chinese scientists identify pathogen involved as new strain of coronavirus

January 9: First death linked to virus

January 20: Cases reported in Beijing and Shenzhen

January 23: First virus outside Wuhan

Travel restrictions placed on Wuhan’s neighboring cities, impacting millions of people

WHO says virus is not yet a public health emergency of international concern

January 28: Death toll tops 100