Corona will be cancer-free for three years in November. But his mother, Elizabeth Anderson, said that she worries that if his cancer does return, it may be impossible to harvest more stem cells from his blood.
今年 11 月，科罗纳将有三年没有复发癌症了。但是他的母亲伊丽莎白·安德森表示，她担心如果他的癌症复发，可能就无法从他的血液中采集更多的干细胞。