Durability of neutralizing antibodies and T-cell response post SARS-CoV-2 infection.

Abstract:

:The ongoing pandemic of Coronavirus disease 19 (COVID-19) is caused by a newly discovered β Coronavirus named severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). How long the adaptive immunity triggered by SARS-CoV-2 can last is of critical clinical relevance in assessing the probability of second infection and efficacy of vaccination. Here we examined, using ELISA, the IgG antibodies in serum specimens collected from 17 COVID-19 patients at 6-7 months after diagnosis and the results were compared to those from cases investigated 2 weeks to 2 months post-infection. All samples were positive for IgGs against the S- and N-proteins of SARS-CoV-2. Notably, 14 samples available at 6-7 months post-infection all showed significant neutralizing activities in a pseudovirus assay, with no difference in blocking the cell-entry of the 614D and 614G variants of SARS-CoV-2. Furthermore, in 10 blood samples from cases at 6-7 months post-infection used for memory T-cell tests, we found that interferon γ-producing CD4+ and CD8+ cells were increased upon SARS-CoV-2 antigen stimulation. Together, these results indicate that durable anti-SARS-CoV-2 immunity is common in convalescent population, and vaccines developed from 614D variant may offer protection from the currently predominant 614D variant of SARS-CoV-2.

journal_name

Front Med

journal_title

Frontiers of medicine

authors

Tan Y,Liu F,Xu X,Ling Y,Huang W,Zhu Z,Guo M,Lin Y,Fu Z,Liang D,Zhang T,Fan J,Xu M,Lu H,Chen S

doi

10.1007/s11684-020-0822-5

subject

Has Abstract

pub_date

2020-12-01 00:00:00

pages

746-751

issue

6

eissn

2095-0217

issn

2095-0225

pii

10.1007/s11684-020-0822-5

journal_volume

14

pub_type

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