COVID-19 antibody test and vaccinations

The Scanwell COVID-19 antibody test detects IgM and IgG antibodies to spike and nucleocapsid protein from the SARS-CoV-2 virus. While we are still learning about the new COVID-19 vaccines, it does appear that most people using our antibody test will test positive after vaccination. In some cases, it may take up to 2-3 weeks after the second dose for two-shot vaccines (i.e. Pfizer or Moderna). Please note that the test cannot distinguish between antibodies from a natural infection vs vaccination and at this time there is insufficient evidence to conclude how the presence/absence of antibodies relates to protection from infection. Please complete an antibody test once per month and indicate in the daily survey when you received your COVID-19 vaccine to help the researchers with tracking. 

Antibody levels naturally decline over time and once they decrease below the test's limit of detection it will lead to a negative result. Please note that there is insufficient evidence at this time to conclude what this means in terms of protection from infection. Protection from viruses is a complex subject and just measuring two antibodies will not provide a complete picture (it doesn't measure T cells, for example). As a reminder, our test is for research purposes only and should not be used to make clinical decisions or change how you keep yourself safe and healthy.

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