This difference in results may be because:
– Different antibody tests can measure different antibody types, which can lead to differing results.
– This antibody test was performed using finger-prick blood sent via post. This means the quality of the blood sample will be lower than that produced with some of the other antibody test conditions, which may affect the antibody research test result.
– Antibody status (both the level of the antibodies and the type of antibodies) changes over time from the point of infection, and so antibody levels may have increased or declined compared with other tests done at different times.
Please be aware that all participants should continue to follow guidelines on self-isolation and social distancing as appropriate, regardless of your antibody test result. In addition, we encourage all study members to have the COVID-19 vaccine when offered, regardless of antibody results.