A cleaner sprays disinfectant in Jordan’s archaeological city of Petra, south of the capital Amman, on March 17. Photo: AFP A cleaner sprays disinfectant in Jordan’s archaeological city of Petra, south of the capital Amman, on March 17. Photo: AFP
A cleaner sprays disinfectant in Jordan’s archaeological city of Petra, south of the capital Amman, on March 17. Photo: AFP

Letters | Coronavirus: why the world must find out what exactly caused Covid-19 pandemic

Topic |   Coronavirus pandemic
A cleaner sprays disinfectant in Jordan’s archaeological city of Petra, south of the capital Amman, on March 17. Photo: AFP A cleaner sprays disinfectant in Jordan’s archaeological city of Petra, south of the capital Amman, on March 17. Photo: AFP
A cleaner sprays disinfectant in Jordan’s archaeological city of Petra, south of the capital Amman, on March 17. Photo: AFP
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