Antibody tests

Antibody tests for SARS-CoV-2 IgG and IgM

Antibody tests contain IgM or IgG class antibodies to SARS-CoV-2 virus. Antibodies against the SARS-CoV-2 reach a detectable level in the patient's blood one to two weeks after infection. An antibody test cannot be used for diagnosis in the early stage of COVID-19 infection.