What is the Antibody Test?
An antibody test screens for antibodies in your blood, which are formed when fighting an infection or in response to specific vaccination, like COVID-19. An antibody test assesses whether your immune system has responded to past infection or vaccination, not if the virus is currently present.
The COVID-19 antibody test used by the Red Cross is available through Emergency Use Authorization by the U.S. Food and Drug Administration. Test results may indicate if the donor’s immune system has produced antibodies to COVID-19 following past infection, regardless of whether they developed symptoms, or following vaccination. Plasma from routine donations with high levels of COVID-19 antibodies that also meet other FDA criteria may be used to treat patients with a weakened immune system battling COVID-19.
Please note the Red Cross is not testing donors to diagnose illness, including COVID-19. If you feel unwell for any reason, please postpone your donation. Individuals who believe they may be ill with COVID-19 should not present to donate until they are symptom free for 10 days and feeling well and healthy.