Two curious people unearthed that Mexico City's Covid-19 death toll is is double the official total, simply by counting excess death figures compared with previous years. See https://www.washingtonpost.com/world/2021/05/03/mexico-coronavirus-excess-death/
Also, BBC published this article https://www.bbc.com/news/world-middle-east-53598965?piano-modal showing that Iran's Covid-19 death rate is double that of the official figures.
Also, BBC published this article https://www.bbc.com/news/world-middle-east-53598965?piano-modal showing that Iran's Covid-19 death rate is double that of the official figures.