| 2 | Flu Study显示文摘Each year there are at least five million people around the world who develop serious flu,and almost half a million deaths.When someone we know gets the flu virus,we expect them to be very careful not to pass it on to others.Doctors and nurses working with flu patients also need to protect themselves from the virus.But what is the best way to do this? | Cath McLellan John O’Reilly | 2020 | 英语世界2020，39，4： | 0 |
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