WU, Tian; SONG, Jiajun; SHE, Yiyang; WEN, Yuxin; WANG, Yiran. A Retrospective Study of COVID-19 Based on A Dual-Stage Model. International Journal of Public Health and Medical Research, [S. l.], v. 1, n. 3, p. 115–127, 2024. DOI: 10.62051/ijphmr.v1n3.17. Disponível em: https://wepub.org/index.php/IJPHMR/article/view/2324. Acesso em: 29 apr. 2026.