Update
On 13 Feb, Chinese health authorities announced a jump in COVID-19 cases from nearly 45,000 to almost 60,000 total cases in mainland China. This spike is primarily the result of a change in diagnosis classification. Previously, only laboratory-tested positive cases were counted. Now, clinically diagnosed cases are being counted among the total, accounting for the large jump. While this number is likely more accurate, the spike in cases is not indicative of rapid new spread of the virus. Shortages of lab testing materials contributed to the decision to move to this new diagnosis classification.