Sugar-coated nanoworms not for breakfast in the human immune system

Iron nanoparticles injected before magnetic resonance imaging can make tissues more visible and the same nanoparticles may allow doctors to precisely target tumors with new medicines. However, among the challenges to the practical use of nanoparticles in the human body is what scientists refer to as lack of "hemocompatibility" - nanoparticles tend to be attacked and cleared by the immune system, negating their usefulness and also potentially causing side effects including shock and loss of blood