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Updated: Nov 6, 2025

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COVID-19 serological survey using micro blood sampling.

Melissa M Matthews1, Tae Gyun Kim1, Satoshi Shibata1

  • 1Molecular Cryo-Electron Microscopy Unit, Okinawa Institute of Science and Technology Graduate University (OIST), Onna-son, Okinawa, Japan.

Scientific Reports
|May 5, 2021
PubMed
Summary
This summary is machine-generated.

A serological survey at OIST University used at-home blood collection kits to test for SARS-CoV-2 antibodies. The study validated a scalable method for community seroprevalence assessment, despite finding no COVID-19 cases in the surveyed group.

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Area of Science:

  • * Infectious Diseases
  • * Immunology
  • * Public Health

Background:

  • * Accurate serological surveys are crucial for understanding the spread of infectious diseases like COVID-19.
  • * Traditional blood collection methods can be invasive and logistically challenging for large-scale testing.

Purpose of the Study:

  • * To evaluate a novel, low-cost, at-home capillary blood collection method for SARS-CoV-2 antibody testing.
  • * To assess the feasibility of a centralized enzyme-linked immunosorbent assay (ELISA) for community seroprevalence studies.
  • * To investigate the persistence of SARS-CoV-2 antibodies and potential cross-reactivity with MERS antibodies.

Main Methods:

  • * A serological survey was conducted among students and employees at the Okinawa Institute of Science and Technology Graduate University (OIST).
  • * Participants used custom, low-cost finger-prick capillary blood collection kits for at-home self-collection.
  • * Samples were analyzed using a FDA-authorized 2-step ELISA protocol, with automated liquid handling for scalability.

Main Results:

  • * No COVID-19 seropositive individuals were detected in the OIST cohort.
  • * The method accurately identified positive and negative control samples.
  • * High antibody titers persisted for over 9 months post-infection, and MERS patient samples showed cross-reactivity.

Conclusions:

  • * Centralized ELISA combined with patient-based capillary blood collection offers a reliable method for assessing community seroprevalence.
  • * The developed workflow is scalable, cost-effective, and suitable for large-scale serological testing.
  • * This approach can serve as a prototype for future public health surveillance of infectious diseases.