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Aid groups are warning that Venezuela's healthcare system is at its breaking point nearly a week after two powerful earthquakes hit the South American country. Damaged hospitals are overwhelmed, and conditions in the disaster zone are worsening. The government death toll has surpassed 1,900. A humanitarian crisis is also unfolding, with thousands of displaced people living in unsanitary conditions. On Tuesday, the U.N. expressed concern about the spread of infectious diseases. The healthcare system has been strained by years of underinvestment. Many hospitals are damaged, and specialist doctors are missing, adding to the chaos.