The immune system makes antibodies to protect the body from current or future infections, such as coronavirus. At MD Now, we test for the antibody, Immunoglobulin G (IgG), which protects against bacterial and viral infections. Detection of IgG antibodies in a blood serology test serves as a standard method to determine if a person has been infected with SARS-CoV-2 and developed specific antibodies to this infection.
IgG antibodies are detected days to several weeks after a person has been infected and may remain elevated for a significant period of time after. These long-term antibodies mean you were most likely exposed to COVID-19 in the past and may allow you to return to your normal daily activities.