### Chinese: 这3人都是学生，本月初从国外旅行回来，由于均为轻症，并未入院治疗。
### English: These three people are all students. They returned from overseas trips earlier this month. Because they all had mild symptoms, they were not admitted to hospital for treatment.
### Errors: There is no error in the English translation.

### Improved English: All of the 3 infected people were students who came back after traveling in other countries at the beginning of this month; all of them were not hospitalized because they were mild cases.
