AUTHOR=Chen Hongliang , Li Yuan , Yuan Liping , Liu Fen , Sun Qian , Luo Qingkai , Lei Yefei , Hou Yinglan , Li Jiayan , Cai Liang , Tang Shixing TITLE=Age-related immune response disparities between adults and children with severe COVID-19: a case–control study in China JOURNAL=Frontiers in Microbiology VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2025.1525051 DOI=10.3389/fmicb.2025.1525051 ISSN=1664-302X