Palestinians take shelter at a school run by the U.N. after fleeing heavy Israeli missile strikes in the outskirts of Gaza City, Wednesday, May 19, 2021. The Gaza Strip's already feeble health system is being brought to its knees by the fourth war in just over a decade. At the school, no one wore a mask or could do any social distancing in the cramped quarters. (AP Photo/Khalil Hamra)
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