The coronavirus patient zero in China may have started having symptoms on December 10 , 2019 .
More recently , on 27 March 2020 , news outlets citing a government document reported that a 57-year-old woman , who tested positive for the coronavirus disease on 10 December 2019 and was described in The Wall Street Journal on 6 March 2020 , may have been patient zero in the coronavirus pandemic .
2019–20 coronavirus pandemic in mainland China