 from Harvard Medical School in 1986, and completed her residency in pediatrics at Children's Hospital, Boston, and her fellowship in pediatric infectious diseases at Boston City Hospital.During her years at Harvard Medical School, Klass began to chronicle her medical training.In 1984, as a third-year medical student, she wrote a series of columns, published in the "New York Times" in the series of “Hers Columns,” describing, among other things, the uncertainty of drawing blood for the very first time, the peculiar locutions of hospital jargon, and the emotional subtext of crying in the hospital.