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Mexico City鈥檚 official Covid 19 death toll did not seem to reflect the full extent of the crisis that hit the country in the spring of 2020 - this is according to Laurianne Despeghel and Mario Romero. These two ordinary citizens used publicly available data to show that excess deaths during the crisis - that鈥檚 the total number of extra deaths compared to previous years - was four times higher than the confirmed Covid 19 deaths.

(Mexican Red Cross ambulances transfer Covid-19 patients to emergency rooms that still have beds. Credit: Alfredo Estrella/Getty Images)