The World Health Organization maintains a real-time dashboard providing an overview of the COVID-19 situation here

Their data is updated live and can be accessed here:

A number of humanitarian organizations are publishing data about different aspects of the global and country-level response to COVID-19. Many of these resources are available in a dedicated COVID-19 crisis page on the Humanitarian Data Exchange.

Many national health authorities also provide updates on a daily basis. Visit your national health authority’s website for more information.