Harold Marcotte, Yunlong Cao, Fanglei Zuo, Luca Simonelli, Josè Camilla Sammartino, Mattia Pedotti, Rui Sun, Irene Cassaniti, Marie Hagbom, Antonio Piralla, Jinxuan Yang, Likun Du, Elena Percivalle, Federico Bertoglio, Maren Schubert, Hassan Abolhassani, Natalia Sherina, Concetta Guerra, Stephan Borte, Nima Rezaei, Makiko Kumagai-Braesch, Yintong Xue, Chen Su, Qihong Yan, Ping He, Caroline Grönwall, Lars Klareskog, Luigi Calzolai, Andrea Cavalli, Qiao Wang, Davide F Robbiani, Michael Hust, Zhengli Shi, Liqiang Feng, Lennart Svensson, Ling Chen, Linlin Bao, Fausto Baldanti, Junyu Xiao, Chuan Qin, Lennart Hammarström, Xinglou Yang, Luca Varani, Xiaoliang Sunney Xie, Qiang Pan-Hammarström
The emergence of Omicron lineages and descendent subvariants continues to present a severe threat to the effectiveness of vaccines and therapeutic antibodies. We have previously suggested that an insufficient mucosal immunoglobulin A (IgA) response induced by the mRNA vaccines is associated with a surge in breakthrough infections. Here, we further show that the intramuscular mRNA and/or inactivated vaccines cannot sufficiently boost the mucosal secretory IgA response in uninfected individuals, particularly against the Omicron variant...
January 16, 2024: Proceedings of the National Academy of Sciences of the United States of America