COVID-19 presence in Brazil since December 2019, study finds
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A study conducted by a local Brazilian health department revealed that the presence of IgG antibodies, specific for SARS-CoV-2 virus which causes Covid-19, was detected in serum samples back in December 2019. The study conducted by the department in the state of Espirito Santo said that 7,370 serum samples had been collected between December 2019 and June 2020 from patients suspected of being infected with dengue and chikungunya.