He is too sick this day to have visitors or go outside. Too much risk for infection. Zac was born in Canada, but spends summers and part of each winter in Fallon. He never drank tap water, only bottled. Of course, Zac's cancer might have nothing to do with what he drank or how he lived.
Cancer results from mutant genes.
The seeds of Zac's disease could have been there since birth, written into his genetic blueprint. The survival rate of this type of childhood leukemia is 80 percent. None of the children here has died. From 1961 to 1982, the federal Centers for Disease Control and Prevention investigated 108 cancer clusters in 29 states and five foreign countries. No clear cause was found.