SARS-CoV-2(23) COVID-19(22) SARS-CoV-2.(13) described(13) Brazil(12) Infection(9) detect(7) Seroconversion(7) Antigen(7) immunization(7) positive(7) expressed(7) sensitivity(7) Mutation(7) Escherichia coli(7) was used(7) Diagnosis(7) purified(7) RT-qPCR(7) Isolation(7) Protein(7) specimen(6) SARS-CoV-2 lineage(6) collected(6) sequenced(6) Lineage(6) increased risk(6) tested(6) B.1.1.33(6) pandemic(6)