A study led by University of California San Diego ... serves as a type of cloaking device that prevents triggering the bacteria's immune system. "When phages infect a bacterial cell, the EPI ...

Smith, David Schurig, and Steve Cummer discuss their work in "cloaking" an object by bending microwaves around it. Their device consists of 10 concentric rings of a copper-and-fiberglass metamaterial.