AUTHOR=Zhang Yu , Gao Jingyao , Xu Wenqi , Huo Xingyu , Wang Jingyan , Xu Yirui , Ding Wenting , Guo Zeliang , Liu Rongzeng TITLE=Advances in protein subunit vaccines against H1N1/09 influenza JOURNAL=Frontiers in Immunology VOLUME=15 YEAR=2024 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2024.1499754 DOI=10.3389/fimmu.2024.1499754 ISSN=1664-3224