1. (2021·陕西) 阅读下面材料，根据材料内容，完成下列各题。

1. （1） What does the writer mostly want to express in his poster?

   He calls on (号召) the readers to COVID-19.

3. （2） Who created this poster and what was it made as?

   It was created by a student named and made as his

5. （3） Which word means"疫苗"in the passage?

   It is .

7. （4） What should countries do according to the student?

   He thinks countries should .

9. （5） Why did the student choose the WHO's words for his poster?

   He wanted to let readers know the of COVID-19.