volunteers for vaccination COVID-19

British Researchers Plan to Infect Healthy Volunteers to Study COVID-19

(при затруднение понимания, перевод в всплывающих подсказках)                                   I’m Ashley Thompson. The Associated Press reported this story. Ashley Thompson adapted it for VOA Learning English. Mario Ritter, Jr. was the editor. Words in This Story  pandemic – n. the fast spread of an infectious disease over a