In addition to Gapminder, another good source of data is a website called Our World in Data.
In particular, take a look at their recently posted article on Coronavirus, which they will be updating as the pandemic develops:
“The purpose of this article on COVID-19 is to aggregate existing research, refer to relevant data and allow readers to make sense of the published early research and data on the coronavirus outbreak.”
Here is a histogram which we can discuss (via the subsection https://ourworldindata.org/coronavirus#case-fatality-rate-of-covid-19-by-age):
