SPRINGFIELD — As Susan Kamuda looks around her Willowbrook neighborhood, she sees fewer kids playing outside and more families leaving the area.“No one wants to go out and no one wants to stay. I meet new people every day who have cancer,” Kamuda said. “I met a man whose wife has cancer, so do his two daughters, and he has cancer, too. One of my best friends has cancer. There are kids in my neighborhood that have leukemia. But you’re not going to hear from them. They don’t even want to …