Rapid diagnostic testing for COVID-19 antibodies is more accurate in plasma

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We compared the positive percentage agreement (PPA) and negative percentage agreement of a COVID-19 IgG/IgM test with whole blood and separated plasma from H.E.R.M.E.S against PCR

Increase in Positive Percentage Agreement with PCR


in whole blood


in H.E.R.M.E.S plasma

Additional increased sensitivity in early infections detected by PCR*

*16 samples from patient who first tested positive for COIVD-19 within 14 days of sample collection


in whole blood


in H.E.R.M.E.S plasma

Increased sensitivity can be noted visually

No test line

in whole blood

IgG test line

in H.E.R.M.E.S plasma

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