Most of the raw figures are sourced from a Chinese page at ncov.dxy.cn,
but that page is China-focused, and their headline figures at the top of the page are for China and associated territories only.
We fetch the data once per hour, and reprocess selected figures to produce a summary. The idea is to present the information in a way English speakers can easily understand. We also add in some custom charts.
There is also the excellent site by John Hopkins University. That site also
sources data from the same Chinese page, amongst others.
Both of the above sites are updated at random times during their respective working days.
Historical data for some of the graphs was taken from the spreadhsheets published by John Hopkins.