Recovery: Post Natural Infection Antibodies Test

With a few simple drops of blood, an immune response can be detected approximately 7 days after infection.

Antibodies Testing after a Natural Infection

With a few simple drops of blood we can determine who may have developed antibodies and were presumed exposed and recovering from either a natural infection to, or by vaccination against this SARS-CoV-2 virus.

An immune response can be detected approximately 7 days after infection.

Today, we cannot draw the conclusion that long-term immunity against COVID-19 exists with one natural infection. As variant strains evolve, it is likely we will need additional vaccinations against new strains to minimize the risk of getting sick ‘again’.

The presence, and later absence of antibodies, may not mean that all immunity has been lost as there is evidence that our body’s immune system has ‘memory’ of antibodies against strains we’ve been infected with or exposed to via vaccination.

The Antibodies Production Process

When a natural SARS-CoV-2 virus invades the body, it causes an infection and multiplies. As the load of virus increases, the body detects the proteins of the virus, also know as antigens. The body mounts an immune response against the antigens by producing antibodies which neutralizes the impact of the virus.

The first type of antibodies created is called IgM. It appears early and wanes quickly. Think of IgM as the elite squad to get the infection quickly under control. This is followed by the IgG antibodies which develop later but are longer lasting. The latter is what we measure to determine recovery from a viral infection.

Self-Test for COVID-19 Antibodies

Second Generation Antibodies Testing

The Elecsys® Anti-SARS-CoV-2 uses human serum and plasma drawn from a dry blood sample, to detect antibodies and determine the body’s immune reaction to SARS-CoV-2 from individuals exposed to the virus and assess the extent of exposure.

This is an immunoassay for the in vitro qualitative detection of antibodies (including IgG) to SARS-CoV-2 in human serum and plasma.


Our immunometric assay testing for antibodies for COVID-19 is laboratory-based and can be collected in the safety and privacy of your home with a self-administered testing kit. This Roche diagnostics platform has a specificity greater than 99.8% and 100% sensitivity (14 days post-PCR confirmation), which means a false positive or false negative is now highly unlikely.

What makes all of our antibodies test distinctive is that you can perform it yourself at home, without the need to go to a laboratory, where the technician wears PPE and does a blood draw and sends one tube of your blood for processing.

Compared to a traditional blood draw sample, our Antibodies test for COVID-19 is collected in a dried blood format. This technique has been validated to be equal in sensitivity and specificity to a standard blood draw.

Once the collection device with a dried blood sample arrives at the CoreMedica Lab, the dried blood sample is reconstituted by adding a buffered solution. The sample is then processed, and results are generally available within 48 hours. The patient will be notified to review the report on a secure HIPPA compliant portal.

Self-Test Blood Spot Collection

Your kit will contain all the necessary supplies for self-collection in the comfort of your own home. The test only requires you to fill 3 circles with 2 drops of blood in each circle. You will collect your blood sample using the paper blot included in your kit.

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