Waning neutralizing antibodies through 180 days after homologous and heterologous boosters of inactivated COVID-19 vaccine - Chen, Zhifei; Xie, Fangqin; Zhang, Hairong; Li, Dong; Zhang, Suhan; Zhang, Mengping; Li, Junrong; Xie, Jianfeng; Zhang, Lina; Yang, Xiuhui; Zhang, Dongjuan (Frontiers in Public Health, 2025)