Diagnostic value and dynamic variance of serum antibody in coronavirus disease 2019.

Int J Infect Dis · 2020 · PMC7194885 · PMID 32251798

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showed a trendno p-value reported

The IgM-positive rate showed a trend to increase at first and then decline; however, the IgG-positive rate increased and then became stable over time.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.