Vascular clots may be the cause for Covid-19 symptoms

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Brazilian scientists have found evidence that patients with severe cases of Covid-19 develop blood clots on the undersides of their tongues. The findings are part of a scientific paper authored by researchers from the University of São Paulo. In the preprint stage, it has still to undergo peer-review. The findings emphasize the presumption that problems with blood clots are the reason for the primary symptoms of Covid-19, potentially leading to respiratory failure. Scientists have been investigating this possibility after finding signs of thrombosis in autopsies of Covid-19 patients. 

The sample is made up of 13 patients that required mechanical ventilation. According to Folha de S. Paulo, the scientists used a microscopic camera able to detect small blood vessels.

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