Evaluation of three immunochromatographic tests in COVID-19 serologic diagnosis and their clinical usefulness.

Results of three rapid immunochromatographic tests (ICTs) were compared with those obtained with two automated immunoassays for evaluation of their usefulness. One hundred fifty-nine patients and 67 healthy volunteers were included. Different assays demonstrate 41-45% of diagnostic sensitivities and 91-98% of specificities, with substantial agreement (89.3-91.2%), but a high percentage of weak positive results (13-22%) was observed with ICTs. ICTs performances were comparable to those of automated immunoassays. ICTs could have a role as screening approach due to their easy usability. Subjective interpretation, significant rate of uncertain results, uncertainty on viral antigens source are undoubtedly drawbacks.