AUTHOR=Marcinkiewicz Janusz TITLE=Post-pandemic upsurge of group A streptococcus infections: potential link to impaired herd trained immunity following COVID-19 lockdowns JOURNAL=Frontiers in Immunology VOLUME=Volume 16 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2025.1684332 DOI=10.3389/fimmu.2025.1684332 ISSN=1664-3224