A 17-Year Observational Analysis of Hospitalized Pediatric Patients with Influenza Virus During the 2009 H1N1 and COVID-19 Pandemics

• by Hedda Trømborg Jalving, Andreas Christensen, Svein Arne Nordbø, Kari Risnes, Henrik Døllner, Inger Heimdal

• February 12, 2026

Explainable machine learning-based mortality risk stratification for older adults with COVID-19: pinpointing core immunological biomarkers and revealing dose-threshold effects

• by Lin Luo, Lin Wang, Hao Wang, Hui Li, Ting Liu, Sha Yu

• May 25, 2026

COVID-19, Vaccines, and Retinal Vascular Disease

A global systematic review of 173 studies found differing associations between COVID-19 infection and vaccination and retinal vascular events, with retinal artery occlusion more common after infection and retinal vein occlusion more common after vaccination.

• by Nirojini Sivachandran, MD, PhD, FRCSC

• May 14, 2026

• 2 min

Association between hypertension and risk of respiratory failure and mortality in patients with COVID-19: a retrospective cohort study with predictive model development

• by Xiaoqing Hu, Kailong Ye, Bifang Miao, Yiqun Dai, Lianghua Guo, Linmiao Zeng, Xiu Chen, Chuanqi Zhu, Qinghua Zhang, Bin Song, Jianhong Xiao

• May 7, 2026