A quarter of the first cases of Covid-19 spotted outside mainland China were people who had traveled to Italy, according to a study published in the medical journal The Lancet Infectious Diseases, which found that the start of the pandemic could be linked to three countries. This work, published this week, takes into account the first case recorded in 99 countries outside mainland China during the first 11 weeks of the epidemic (between December 31, 2019 and March 10, 2020): they show that nearly two thirds (60 %) of these people had traveled to Italy (27%), China (22%) or Iran (11%).
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