"The official government estimate of 64 deaths from the hurricane is low primarily because the conventions used for causal attribution only allowed for classification of deaths attributable directly to the storm, e.g., those caused by structural collapse, flying debris, floods and drownings," the report says. "During our broader study, we found that many physicians were not oriented in the appropriate certification protocol. This translated into an inadequate indicator for monitoring mortality in the hurricane's aftermath."

BREAKING: Hurricane Maria caused an estimated 2,975 deaths in Puerto Rico, according to a report from George Washin…https://t.co/ewGq3KDQGF