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Updated: Sep 3, 2025

A Suction Blister Protocol to Study Human T-cell Recall Responses In Vivo
Published on: August 11, 2018
Memory B-Cell Development After Asymptomatic or Mild Symptomatic SARS-CoV-2 Infection
Yu Kato1, Nathaniel I Bloom1, Peifang Sun2
1Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, California, USA.
Background:
The development of memory B cells after asymptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is not well understood.
Methods:
We compared spike antibody titers, pseudovirus neutralizing antibody titers, and memory B-cell responses among SARS-CoV-2 PCR-positive Marine recruits who either reported asymptomatic or symptomatic infection.
Results:
Thirty-six asymptomatic participants exhibited similar spike IgG titers, spike IgA titers, and pseudovirus neutralization titers compared to 30 symptomatic participants. Pseudovirus neutralization and spike IgG titers showed significant positive correlations with frequency of memory B cells.
Conclusions:
Among young adults, asymptomatic SARS-CoV-2 infection induced antibody and memory B-cell responses comparable to mild symptomatic infection.
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