The Cancer Strikes Again

It's my 9th year of teaching.

My third student is in the hospital fighting for his life, riddled with the same cancer that killed two previous students.

I know in the science world correlation doesn't necessarily mean causation. But cigarettes do cause cancer. I'm not a doctor, but this cancer seems to be killing poor teenagers who have learning disabilities. I've worked in a wealthy neighborhood and no one died from this cancer. I now work in a poor neighborhood, and this cancer has directly killed four students, indirectly killed another (he committed suicide after being struck by it), permanently maimed four, and now another one lies in the hospital in a vegetative state on life support. When is the medical community going to address this crisis?