In the bright but silent children’s oncology ward in Yaroslavl, renowned pediatric oncologist Dr. Andrei Kartashov stood powerless at his son Yegor’s bedside. The eight-year-old, pale and hairless from acute leukemia, barely clung to life. Monitors blinked weakly, and for the first time, the doctor once full of confidence—was simply a grieving father.A quiet knock interrupted the stillness. Expecting a...