Evaluation of the Truvian Easy Check COVID-19 IgM/IgG Lateral Flow Device for Rapid Anti-SARS-CoV-2 Antibody Detection

Am J Clin Pathol. 2021 Feb 4;155(2):286-295. doi: 10.1093/ajcp/aqaa221.


Objectives: To evaluate the analytical and clinical performance of the Truvian Easy Check coronavirus disease 2019 (COVID-19) IgM/IgG anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibody test.Serologic assays have become increasingly available for surveillance through the Food and Drug Administration emergency use authorization in the ongoing COVID-19 global pandemic. However, widespread application of serologic assays has been curbed by reports of faulty or inaccurate tests. Therefore, rapid COVID-19 antibody tests need to be thoroughly validated prior to their implementation.

Methods: The Easy Check device was analytically evaluated and its performance was compared with the Roche Elecsys anti-SARS-CoV-2 antibody assay. The test was further characterized for cross-reactivity using sera obtained from patients infected by other viruses. Clinical performance was analyzed with polymerase chain reaction-confirmed samples and a 2015 prepandemic reference sample set.

Results: The Easy Check device showed excellent analytical performance and compares well with the Roche Elecsys antibody assay, with an overall concordance of 98.6%. Clinical performance showed a sensitivity of 96.6%, a specificity of 98.2%, and an overall accuracy of 98.1%.

Conclusions: The Easy Check device is a simple, reliable, and rapid test for detection of SARS-CoV-2 seropositivity, and its performance compares favorably against the automated Roche Elecsys antibody assay.

Keywords: COVID-19; Coronavirus; Diagnostics; IgG; IgM; Lateral flow; Point-of-care; SARS-CoV-2 antibodies; Surveillance.

Publication types

  • Evaluation Study

MeSH terms

  • Antibodies, Viral / blood*
  • COVID-19 / diagnosis*
  • COVID-19 Serological Testing / instrumentation*
  • Cross Reactions
  • Humans
  • Immunoglobulin G / blood
  • Immunoglobulin M / blood
  • SARS-CoV-2 / immunology*
  • Sensitivity and Specificity


  • Antibodies, Viral
  • Immunoglobulin G
  • Immunoglobulin M