We can thank the 21st century for making us this way. Pumping chemicals into our food, soaking every piece of cloth with flaming retardents, teflon poisening, heavy metals, GM crops, medicines and chemical in water supplies, cosmetics, chemical residues from manufacturing processes, air pollution. The healthy life of the 21st century. Molly's body was probably so soaked up with poisens to start with, that her immune system went berserk and developed allergies, and is probably weaker.
Too many people, too many unnatural resources, is it that difficult to see? use hemp instead of wood and oil, use the stupid and sick as fertilizer, now it's all about marketing