Why antibody testing Is not currently recommended to assess immunity after COVID-19 vaccination?
Currently authorized SARS-CoV-2 antibody tests have not been evaluated to assess the level of protection provided by an immune response to COVID-19 vaccination. If antibody test results are interpreted incorrectly, there is a potential risk that people may take fewer precautions against SARS-CoV-2 exposure.
Can a COVID-19 antibody test tell you how much protection you might have?
Test results from currently authorized SARS-CoV-2 antibody tests should not be used to evaluate a person’s level of immunity or protection from COVID-19.
What is IgM antibody?
IgM is present in jawed vertebrates (gnathostomes) that existed already during the Devon period over 400 million years ago. An IgM antibody test is very important because it generally comes up earlier on an infection, and it is detectable 4 to 7 days after an infection starts.
What is IgG (IgG)?
The immunoglobulin G (IgG), on the other hand, is the most common antibody found in the blood and a major effector molecule of the humoral response that accounts for about 75 percent of serum antibodies in humans.
What are the results of serum IgM and IgG tests?
Serum IgM and IgG results were negative, and the values were 0.71 and 0.73 U/L. A CT scan was performed on February 8, 2020, and the results are shown in Figure 5B. The CT results showed no clear lesions in both lungs. Serological tests and characteristic changes in CT imaging of this patient were consistent.
What is the effect of a longitudinal detection of antibodies on IgM?
A longitudinal detection of antibodies revealed that IgM levels decreased rapidly in recovered patients, whereas in deceased cases, either IgM levels remained high or both IgM and IgG were undetectable during the disease course. Conclusion