The 2019-20 coronavirus outbreak is an ongoing epidemic of Coronavirus Disease 2019 ( COVID-19 ) caused by SARS-CoV-2 , which started in December 2019 and was first identified by authorities in Wuhan , capital of Hubei province in China , in January 2020 after 41 people presented with pneumonia of no clear cause .
COVID-19 is a 2019-nCoV acute respiratory disease .