The WHO Coronavirus disease (COVID-19) Situation Dashboard provides an overview of confirmed cases and deaths, alongside the number of countries, areas or territories with cases. The dashboard allows displaying the number of cases by date of report as well as cumulative cases. The underlying data can be downloaded by clicking on "Download Map Data" in the lower right-hand corner.
Other visualizations of the data can be accessed by clicking on "Explorer" in the upper right-hand corner.
Additional information from the WHO about the pandemic is available on a dedicated web page.