Cancer: It's Not as Difficult as You Think
https://www.slideserve.com/k1urmng966/how-to-outsmart-your-boss-on-student-marketing-powerpoint-ppt-presentation
There are great deals of sources of cancer cells, and a few are avoidable. Where it spreads relies on the type of cancer cells. A phase 1 (I) lung cancer cells is a little tumour which hasn't infected any type