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The prototype for a low-cost ventilator for patients with COVID-19 is calibrated by engineering professors from La Sabana University, Julian Echeverry, left, and Andres Ramirez, in Bogota, Colombia, Tuesday, April 14, 2020. Scientists in Colombia have developed a mechanical ventilator for COVID-19 patients that could cost as little as $2,000 and help the South American country to cope with a global shortage of these devices. (AP Photo/Fernando Vergara)

The prototype for a low-cost ventilator for patients with COVID-19 is calibrated by engineering professors from La Sabana University, Julian Echeverry, left, and Andres Ramirez, in Bogota, Colombia, Tuesday, April 14, 2020. Scientists in Colombia have developed a mechanical ventilator for COVID-19 patients that could cost as little as $2,000 and help the South American country to cope with a global shortage of these devices. (AP Photo/Fernando Vergara)

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