Not directly related to CLL but interesting regarding our immune system
"As the roughly 30 trillion human red blood cells cruise the bloodstream and supply tissues with oxygen, they may also be doing something biologists did not expect: scanning for signs of infection and injury. According to new findings that would dramatically expand their roles, red blood cells snare suspect DNA from microbial invaders or damaged tissue and warn the immune system of danger.'
Lots more information here: science.org/content/article...
Jackie