If a person touched a dead body they were considered unclean. A person who is not acceptable for God's purposes is spoken of as if the person were physically unclean. (See: [[rc://en/ta/man/translate/figs-metaphor]])
# you must send
Here "you" is plural and refers to the people of Israel. (See: [[rc://en/ta/man/translate/figs-you]])
# The people of Israel did so
This means that they sent the unclean people away. The full meaning of this statement can be made explicit. AT: "The people of Israel sent those who were unclean out of the camp" (See: [[rc://en/ta/man/translate/figs-explicit]])