The Covid-19 outbreak has become a global health emergency. This repo shares statistics of this outbreak in mainland China. Data are extracted from daily briefings of China's National Health Commission (http://www.nhc.gov.cn/yjb/pqt/new_list.shtml), Hubei Province Health Commission (http://wjw.hubei.gov.cn/bmdt/ztzl/fkxxgzbdgrfyyq/xxfb/), and Wuhan Health Commission (http://www.nhc.gov.cn/yjb/pqt/new_list.shtml). Counts for each day are cumulative or daily counts at 24:00 of that day (Beijing time). A summary of the analysis is at https://twitter.com/audreyqyfu/status/1224078188839497728.

Data files are updated daily. Counts in Wuhan before Jan 16, 2020 are unreliable.

Fields in data file are explained below. Not all fields are reported by all the sources; missing data are indicated by NA.

• Cases: cumulative confimed cases;
• Deaths: cumulative deaths;
• Recovered: cumulative number of individuals that have beeen discharged from hospital;
• Severe: number of severe cases at the end of that day. News briefings from Hubei Province Health Commission further separate these cases into Severe and Very Severe, which are lumped together in the data files here;
• Suspected: daily cases that are waiting for diagnostic results;
• CloseContact: cumulative count of individuals that have been in close contact with a confirmed case;
• UnderObservation: daily count; among CloseContact, individuals that are under observation by medical professionals;
• NoLongerObserved: CloseContact - UnderObservation; individuals who were once in close contact with a confirmed case but are no longer suspected to have the infection. This field is no longer reported in the daily briefing since Feb 5, 2020;
• CurrentlyConfirmed: number of confirmed cases at the end of that day.