The impact of COVID-19 on the cascade of care of HCV in the US and China Yee Hui Yeo; Xu Gao; Jian Wang; Qingyu Li; Xingyang Su; Yu Geng; Rui Huang; Chao Wu; Fanpu Ji; Vinay Sundaram; Mazen Noureddin; Maria Buti; Walid S. Ayoub;