This is 124% worse than most pie charts that I've seenhttps://twitter.com/KetanJ0/status/1285540081269440517 …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
And using it as a reasonable estimate of prevalence. Someone should correct those mistakes @TomMcIlroy
It's already set off the amateur twitter epidemiologists along with Professor Creighton from the Australian.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.