so why should cancer be any different answer is what happens when a normal
cells jeans make it grow too much it's an inside job unlike all those other
infectious diseases that are carried by other people and can spread within a
patient's body went straight cancer cells latch on in new places and keep
growing as long as you have a working immune system you can't catch it from
someone else at least not unless you're a dog a Tasmanian devil or an
unbelievably unlucky human your immune systems job is to detect and destroy
invaders like viruses bacteria and cells from other humans or someone else's
cancer cells get into your body your immune system will realize it's not