AUTHOR=Wang Yan , Han Ruiyang , Ding Xiao , Chen Junli , Feng Wenjia , Wang Chunping , Gao Runguo , Ma Anning TITLE=A 32-year trend analysis of lower respiratory infections in children under 5: insights from the global burden of disease study 2021 JOURNAL=Frontiers in Public Health VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2025.1483179 DOI=10.3389/fpubh.2025.1483179 ISSN=2296-2565