好像IgM是测有没有刚得过，IgG是测抗体（或得过一段时间了）。我打疫苗后2周测过，有IgG, 没有IgM。

EcoTest is one of only a small number of COVID-19 rapid antibody tests that have both FDA Emergency Use Authorization and that detect two types of antibodies (IgM and IgG) - IgM peaks early in the disease and IgG peaks later during the illness. This combination provides broader capture of patients exposed to COVID-19. EcoTest performance was validated by a US physician-researcher and several of the box contents were enhanced as a result. There is no other COVID Rapid Antibody test like it on the market. EcoTest is for professional use only.