isolate (someone or something) from (someone or something)
To keep someone or something away from someone or something else. He's abusive, so of course he's trying to isolate Gail from the rest of her family. We need to isolate the healthy chickens from the ones that are sick.
isolate someone or something from someone or something
to keep people or things separated from one another, in any combination. They isolated everyone from Sam, who was ill with malaria. We isolated the children from the source of the disease.