Read the text below. Then rewrite the underlined sentences (1-8) in the passive. Decide whether you need to include the agent. (Đọc văn bản dưới đây và viết lại các câu được gạch chân (1-8) ở thể bị động. Nghĩ xem có cần thêm tác nhân vào câu hay không.)

It was called ‘The Great Mortality’, but today (1) we know it as the Black Death. In 1348, (2) rats brought the plague from Asia to Europe. (3) The disease killed millions of people.

The cities were overcrowded with frightened people and (4) coughs and sneezes quickly infected them. Similarly, in 2019, (5) COVID-19 attacked different areas of the world. (6) The virus corona infected millions of people. (7) Authorities had to lock down many cities to stop the infection. This virus is still popular but (8) vaccines can save patients from danger.