Cohort study protocol of the Brazilian collaborative research network on COVID-19: strengthening WHO global data.

Introduction: With the COVID-19 pandemic, hospitals in low-income countries were faced with a triple challenge. First, a large number of patients required hospitalisation because of the infection's more severe symptoms. Second, there was a lack of systematic and broad testing policies for early identification of cases.

Spontaneous Hemopneumothorax: A Rare Cause of Unexplained Hemodynamic Instability in a Young Patient.

Spontaneous hemopneumothorax is a rare and potentially life-threatening disorder which complicates about 1-12% of patients presenting with spontaneous pneumothorax and has a remarkable predilection for male patients. It may present with signs of hypovolemic shock without apparent cause. While there are no specific guidelines for the management of patients diagnosed with such condition, wide debate in the literature relating to patient selection for surgery remains unresolved, and recently there seems to be a trend increasingly favorable towards early surgical intervention.