Optimizing COVID-19 vaccination for older adults: superior efficacy of heterologous regimens in reducing infection and mortality rates among patients aged 80 years and older during the Omicron BA.5/BF.7 outbreak.

CoronaVac - Sinovac, Bio Farma Indonesia

Zifivax (ZF2001) - Chinese Academy of Medical Sciences, Chongqing Zhifei

http://www.ncbi.nlm.nih.gov/pubmed/42393578

Awei Sheng; Bo Shen; Sailing He; Songlin Qiu; Yijun Chen; Yufen Zheng

Jul 4, 2026