VOA慢速英语:新冠疫苗是如何在创纪录的时间内研发出来的

paralyzed –adj. unable to feel or move parts of the body

Phase 3 –n. a level of developing a vaccine when it is tested on people to better understand their reactions

therapy –n. treatment for an illness

submitted –v. offered for review and approval

patent –n. an official document that gives a person the right to be the only seller of a product for a period of time

therapeutic –adj. related to treatment and therapy

licensed –v. having official permission to have something or receive gain from it