Intranasal vaccination induced cross-protective secretory IgA antibodies against SARS-CoV-2 variants with reducing the potential risk of lung eosinophilic immunopathology

Takuya Hemmi, Akira Ainai, Takao Hashiguchi, Minoru Tobiume, Takayuki Kanno, Naoko Iwata‐Yoshikawa, Shun Iida, Yuko Sato, Shô Miyamoto, Akira Ueno, Kaori Sano, Shinji Saito, Nozomi Shiwa-Sudo, Noriyo Nagata, Koji Tamura, Ryosuke Suzuki, Hideki Hasegawa, Tadaki Suzuki