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. 2020 Oct 19;11:584251. doi: 10.3389/fmicb.2020.584251

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Copyright © 2020 Brochot, Demey, Touzé, Belouzard, Dubuisson, Schmit, Duverlie, Francois, Castelain and Helle.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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SARS-CoV-2 NAbs in asymptomatic individual samples. (A) SARS-CoV-2pp were pre-incubated with serially diluted plasma obtained from 25 asymptomatic patients that were seropositive with commercial serological assays (AP1 to AP25). Dose response curves represent the means of normalized infectivity (%) from two independent experiments performed in duplicate. Error bars have been omitted for clarity. (B) Determination of the NAb titer in plasma samples from 25 asymptomatic patients.