Understand

Your Results

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Interpret Your Results

If You Tested Negative

A negative result for both IgG and IgM means that you have likely not been infected with the SARS-CoV-2 virus.

See details below

If You Tested Positive

Quick overview:

• A single positive result from either antibody, or both (IgG plus IgM), indicates you have likely been exposed to a coronavirus, even in the absence of symptoms from the infection.

• Unrelated Coronaviruses usually cause the common cold, though they can be responsible for more severe illnesses as noted in Covid-19. Human coronaviruses that are particularly prevalent include 229E, NL63, OC43, and HKU1.

• Hence, a SINGLE POSITIVE result cannot be interpreted as conclusive evidence of a previous exposure to the SARS-CoV-2 virus which causes COVID-19.

• Therefore, you should REPEAT your test in 1 to 2 months.

• Only a REPEAT POSTIVE test for IgG, over a longer period of time indicates likely immunity.

See details below

TNP Results

A single TNP result means that your sample could not be processed because the sample had insufficient serum. TNP stands for Test Not Performed. Depending if your TNP was for IgG or IgM, plus your present symptoms, will determine if we should recollect your sample. We will be in contact with you.

What are IgM and IgG Antibodies?

IgM Antibodies

They are developed first to fight off early exposure to infection to encourage the body to fight any viral attack. IgM antibodies usually appear as early as day 3 after exposure and are usually difficult to detect after 14 days from exposure. The presence of IgM antibodies could mean that you are still infectious.

IgG Antibodies

They are developed as a secondary line of defense. It is also a more ‘permanent’ form of antibodies. They are often termed ‘convalescent’ antibodies. IgG antibodies usually appear as early as day 10 after exposure. At this time, we are still seeing recovered patients testing positive for IgG 6 months post-viral infection from exposure. The presence of IgG antibodies could mean that you’ve developed some form of immunity.

Why Can't You ‘Certify’ Me as Immune Yet?

Your antibodies have been developed for one COVID-19 strain that you were exposed to. We are aware that this virus has mutated over 250 times to date. Hence, if you become exposed to a newer strain, that is not genetically close enough to the old strain, your antibodies will be less effective against this newer strain. Though, practically, you are far better off having some antibodies than none.

This is a similar analogy to the Influenza A virus. We need to get flu shots annually to develop immunity against a ‘new strain.’ Though, getting many years of flu shots does improve overall immunity over many years.

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You've Tested POSITIVEfor Covid-19 Antibodies Test

Possible Outcomes

Positive IgG and Negative IgM

You have likely been exposed to COVID-19 virus for at least 21 days, if not longer. You are no longer infectious, but could be re-infected in the future.

How you react to this new infection will be determined by:

• Amount of IgG antibodies you have developed
• Strain of IgG antibodies you possess

Your IgG antibodies have been developed for one COVID-19 strain that you were exposed to. If you become exposed to a newer strain, that is not genetically close enough to the old strain, your antibodies will be less effective against this newer strain. Though, practically, you are far better off having some antibodies and hence some form of immunity than none.

Hence, stay vigilant and continue to practice excellent precautions.

If you continue to have concerns or questions, contact us at: dr.chin@executivehealthcentre.com

Negative IgG and Positive IgM

You have likely been exposed to COVID-19 virus in the past 7-14 days. You are likely infectious and should self-quarantine and wait for further directions.

Contact us at: dr.chin@executivehealthcentre.com if you have not already been in contact with us.

Positive IgG and Positive IgM

You have likely been exposed to COVID-19 virus in the past 7-21 days. You are likely infectious and beginning to recover from the infection. You should self-quarantine and wait for further directions.

Contact us at: dr.chin@executivehealthcentre.com if you have not already been in contact with us.

What Does This Mean

to You and Your Loved Ones?

ONLY IgG Positive

You’ve tested positive for IgG, which means at some point, you were infectious.

Your immediate family and, if applicable, close working colleagues should also be tested for antibodies to see if they’ve been infected by you.

IgM Positive

If you tested positive for IgM, you should immediately get tested for viral load and also have all your close contacts be tested for viral load as well.

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You've Tested NEGATIVEfor Covid-19 Antibodies Test

A negative test (IgG plus IgM) indicates you have likely not been exposed to the virus.

All clinical tests will render a negative result, especially during the early stages (day 1-5) of infection.

Note: Core Medica Lab has aired on the side of ensuring there are more true positives and false negatives.

Next Step

If you feel that you were infected by COVID-19 and tested negative for antibodies, you should consider re-testing in 4-8 weeks, as your antibody levels may increase over the near term.

NOTICE

The DropTM COVID-19 antibody test performed by CoreMedica, established in 2020 in Lee’s Summit, Missouri, USA, specializes in minimally invasive testing. CoreMedica is a CLIA licensed and CAP Accredited Laboratory.

 

Laboratory Testing

CoreMedica’s SARS-CoV-2 virus IgG and IgM antibody test is under the regulatory jurisdiction of the U.S. Department of Health and Human Services who enforces the Clinical Laboratory Improvement Amendments (CLIA) program. Any organization must have a CLIA certificate in order to provide clinical laboratory services in the United States. The CLIA program is administrated by the Centers of Medicare and Medicaid (CMS), the Centers for Disease Control and Prevention (CDC), and the Food and Drug Administration (FDA). PEUA200459

The ELISA testing methodology used by CoreMedica for antibodies detection does not require Health Canada approval because the test is completed using a standardized laboratory technique in a licensed laboratory in the United States and ordered by a licensed Canadian physician.

 

Dry Blood Spot Collection Device

The HemaSpot-SE Blood Collection and Transport Device is listed with the FDA as a Class I device (general controls), Product Code: NNK, and under 21 CFR 864.3250. This device is exempt from the premarket notification and does not require FDA approval.

In Canada, CoreMedica has filed their HemaSpot-SE™ Collection Device with Health Canada and are awaiting approval that this device meets the health and safety standards of Health Canada to collect blood drops. Therefore, blood collection using the HemaSpot-SE™ Collection Device in Canada will be performed under physician supervision until this device is approved by Health Canada.

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