sentences: the vulnerable temperature reads virus once they have invaded the mind & bacteria is a kind of pathogen sometimes ->  the immune system attacks pathogens in the body  the vulnerable tongues killing feather in the mind & white blood cells are a part of the immune system -> white blood cell attacks pathogens in the body white blood cell attacks pathogens in the body  white blood cell attacks pathogens in the body & scratching can effect health -> white blood cells attack disease in the body