Ding, Xiao, Jiru Ye, Yao Tang, and Feng Zhu. “Association Between Vaccination and Days of Hospitalization in Adult Patients With Non-Severe COVID-19”. The Journal of Infection in Developing Countries 18, no. 01 (January 31, 2024): 34–43. Accessed February 22, 2025. https://jidc.org/index.php/journal/article/view/38377092.