|Why are antibody tests useful?
Antibody tests can fill a diagnostic gap. In the earlier phases of the disease – several days after
the onset of symptoms – the IgM antibody test can be used to screen for active infections with
SARS-CoV-2 and help to distinguish between COVID-19 and other respiratory diseases such
as influenza or RSV. In the later stages, the IgG antibody test can help to detect previously un-
detected infections and screen the serological immunity of large numbers of the population. In
addition, the IgG antibodies remain in the body for a long time after the patient has recovered.
Therefore, the result is a marker for successful convalescence in ONLY IgG-positive patients.
Since antibody tests are much faster and easier to perform, the extended use of these tests
could relieve the laboratories and help to keep capacity at the same level.
|When should I test with the COVID-19 IgG/IgM Rapid Test?
The COVID-19 IgG/IgM Rapid Test is intended to complement the RT-PCR tests, which are cur-
rently performed in large numbers by doctors, laboratories and public health authorities throug-
hout the world in the fight against the novel Corona-Virus SARS-CoV-2.
During the earliest stages of the disease – in the incubation period (according to WHO around 5-6
days on average) and on the first 2-3 days after the onset of symptoms – only RT-PCR can give
you satisfactory test results as the body has not produced antibodies in detectable quantities.
5-7 days after the onset of the disease symptoms (cough, slight fever, sore throat) IgM antibodies
can already be detected in the blood. After this period of approx. 7 days, we recommend testing
with the COVID-19 IgG/IgM rapid test, as positive results can now be obtained with a high de-
gree of certainty. IgG antibodies are later produced by the immune system and can be detected
in the body long after recovery. In this way, undetected infections (e.g. infections without symp-
toms) or the serological protection of the test subject can be determined.