FAQ

An antibody test can, with very high accuracy, determine if you have had a Covid-19 infection or not. A complete infection with antibody response gives an increased resistance. At present, it is not known whether we will have a marginally increased defense or full immunity. A test can give you increased support in decisions in everyday life or support in how to distribute your resources in an organization or in a company.

Antibodies are the immune system's targeting robots. There are more non-specific emergency antibodies (IgM) that are formed immediately when you start to get symptoms and memory antibodies (IgG) that start to form about 10 days into the infection and normally remain for anywhere from 6 months to several years. When a foreign virus or other microorganism infects us, the immune system creates these antibodies which, in this case, look for the invading virus particles - attach to them and thereby mark them for the immune system which then destroys the virus particles.
IgM is a non-specific antibody in nature and it is more non-specific than IgG. Compare a shotgun (IgM) with a precision rifle (IgG). IgM (the acute antibodies) should quickly limit the infection and then the body creates IgG which is very precise and stays in the body for a long time. IgG are the antibodies that make up our long-term protection, ie our antibody immunity. 
The course of infection means that you first become infected, then you have a 2-14 day incubation period before the onset of symptoms. Early in the disease phase (from day 3-5 to day 10-14 after the onset of symptoms), one thus becomes IgM-positive. IgM normally remains for 3-5 weeks (but can remain for a long time). Thus, when IgG begins to be produced on days 10-14, IgM and IgG are positive until IgM disappears, then only the IgG positivity remains. 
 
Note that this is the activity of the disease in the blood and does not describe whether you are contagious or not. 
You are infection-free when you have been symptom-free for 48 hours. 
 
An isolated positive IgM, which indicates that you are day 3-14 into the disease phase, is difficult to interpret as the antibody is non-specific in nature. It should always be checked with a PCR to confirm / write off suspicion of ongoing infection. IgM can also persist long after illness, but it has not been determined what it means for immunity. Rapid testing for antibodies is more uncertain in the diagnosis of IgM due to its non-specific nature but is very reliable for IgG. 
 
A response that results in both IgM and IgG in a person who no longer has symptoms is interpreted in the same way as an isolated positive IgG - ie that a long-term protection has developed. 
 
According to the Swedish Public Health Agency, long-term protection lasts at least during this season and the presence of IgG means that you can meet people in risk groups when you are symptom-free. As long as you are symptom-free and have IgG, infection is considered unlikely. 
 
You may be able to get Covid-19 again next season if the virus mutates or if antibody protection disappears. It is not clear yet. 
ANTIBODIES: In the event of a confirmed infection, the test over 98% is safe. The test has a sensitivity of 92-95% (Common for IgM and IgG) where the uncertainty of the detection of IgM is judged to be the factor that increases the risk of false negative responses. By only testing individuals who have been symptom-free for at least 48 hours and where at least 14 days have passed since the onset of the disease, we increase the safety of the testing. 
PCR: All our samples are sent to a SWEDAC-accredited safety laboratory. The laboratory is approved by the Swedish Public Health Agency for the diagnosis of COVID-19. 
Specificity> 99.5%, ie if the test is positive, the probability is high that the answer is true. 
1 ANTIBODY TEST: A simple stick in the finger. The blood is dropped into a test cassette and then travels along a membrane where up to three lines can be shown. C - means CONTROL LINE. If it does not appear, the test is invalid and must be repeated. Then there are two more dashes that can appear - one for IgM (acute antibodies) and one for IgG (memory antibodies). See “What are antibodies” under FAQ for interpretation. 
If two or more streaks appear, it indicates an ongoing or ongoing infection. A doctor will explain what this means for you.
 
2 PCR: A special sampling stick is taken and inserted at the back of the nose to the posterior pharyngeal wall. There, the stick is rotated ten times against the mucous membrane. The sample is then sent to our accredited safety laboratory and analyzed. You will receive an answer and can pick up an English travel certificate at our clinic 2 weekdays later. The certificate is issued by our licensed physician. 

Based on previous experience, it is unlikely that you would be re-infected with Covid-19 and become ill a second time during the same season. It is not clear if the virus mutates and in that case can reinfect next season. In the event that the antibody protection disappears next season, you can probably be reinfected.

It is transmitted mainly through droplet infection, ie when someone coughs, sneezes or speaks. An arm's length distance is usually sufficient to avoid exposure.

CE means that the test has been reviewed by a European authority, ensured that it meets standards for sale and free movement within the EU. A CE-certified medical device is under the control of the Medical Products Agency and may be sold freely on the Swedish market.

This means that your immune system is equipped with defense mechanisms of sufficient quantity and accuracy and in the right place in the body to be able to ward off an attack by a microorganism without you getting any obvious symptoms or that you become contagious.

 

The blood is dropped on a test strip of nitrocellulose prepared with colloidal gold-labeled antigen. If antibodies are present, these complexes form Ig and the colloidal gold-labeled antigen and are sucked up into the membrane by capillary force. At each IgM / IgG line, there are nitrocellulose-immobilized anti-human mouse IgM / G antibodies, which bind and form complexes with the antibody / colloidal gold-antigen complex and a red line appears.

The non-captured immune complexes migrate further and bind at the control line.

 

It is up to your employer how they want to organize the work at your workplace. At the individual level, continued caution is recommended. It is not recommended to deviate from FHM's instructions. You are responsible for how you choose to handle your test result.

The two most common:

a) Serological tests, what we have here - a test that shows the presence or absence of antibodies. This test can show a long-term infection (months - years). Worse to detect an acute ongoing infection. The sample material consists of serum, plasma or whole blood.

b) Nucleic acid detection - PCR - a type of test where you look for a specific sequence of eg a virus and look for its presence in a sample. This provides a snapshot of whether the virus is present in the patient at this time. Gets negative early in the process and when the virus is no longer present in the body. Cannot detect past infection. Taken via tops in nose / throat / rectum.

We only test you if more than 7 days have passed since you fell ill and you have been problem-free for at least 48 hours. NOTE! No exceptions are made to this rule!