Can someone in the school who is in close contact with the same school go out for the exam?

you can contact the school and ask, but if the school is closed, you can't get out.

secret and sub-secret workers need to go to the hospital for centralized isolation and are not allowed to go out. Key populations need to be isolated in schools. Schools with serious confidential personnel will be closed. If it is not necessary, try not to go out, or you can contact the examination point for online examination.