Analytical and clinical performances of five immunoassays for the detection of SARS-CoV-2 antibodies in comparison with neutralization activity.

3 , right panel), whist a decreasing trend can be observed and could be verified in a more representative sample size.

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However, multivariate linear regression analyses confirmed that, among the studies variables (age, gender, disease severity and time from symptoms onset), only time from symptoms onset was associated, with an increasing trend, with SARS-CoV-2 Ab serum levels ( Supplementary Tables 9-13 , Supplementary Figures 1-2 ).

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