Here’s a little info on how it worked. The gene-editing genetically engineered white blood cells which gave the children’s bodies the ability to target those cancerous cells that were killing them. It was said that the molecular remissions were successfully achieved in both infants in just 28 days. In just one month’s time, the girls are showing no signs of having acute lymphocytic leukemia. This exact technique was previously used by different drug companies. However, in the past the white blood cells that were engineered were extracted from those patients who were going through cancer treatments.