Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2021 Jan 19;10(1):152–160. doi: 10.1080/22221751.2021.1872352

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group, on behalf of Shanghai Shangyixun Cultural Communication Co., Ltd

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

PMC Copyright notice

Figure 4. — Comparison of total IgG and NAb titres between primary infection and reinfection of ferrets. Immunofluorescence assay (IFA) was performed with sera of SARS-CoV-2 infected ferrets using fluorescein-labeled anti-ferret IgG antibody (A and C). Vero cells were infected with 1 × 10³ TCID₅₀/mL NMC-2019-nCoV02 (S clade) (A), CBNU-nCoV02 (GH clade) (C) and incubated with serially diluted ferret sera. Fluorescein-labeled anti-ferret IgG was used as the secondary antibody. NAb titre against NMC-2019-nCoV02 (100 TCID₅₀) (B) and CBNU-nCoV02 (100 TCID₅₀) (D) were measured using Vero cells (B and D). Data are presented as geometric mean ± SD. Asterisks indicate statistical significance compared with primary infection sera by two-way ANOVA Sidak’s multiple comparisons test (* indicates p < 0.05, ** indicates p < 0.01, and *** indicates p < 0.0001).