AUTHOR=Cheng Zhangkai J. , Zheng Peiyan , Xue Mingshan , Chen Youpeng , Sun Baoqing 

TITLE=Identifying COVID-19 Infections From a Vaccinated Population Using Specific IgA Antibody Test

JOURNAL=Frontiers in Immunology

VOLUME=13

YEAR=2022

URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2022.821218

DOI=10.3389/fimmu.2022.821218

ISSN=1664-3224

ABSTRACT=<p>We analyzed the serum from COVID-19 patients and vaccinated subjects, and found that the specific IgA titer level could be used to assist COVID-19 diagnosis, especially in China.</p>