Describes the study published in the scientific journal Pediatrics, performed to determine whether homeopathy is useful in the treatment of acute childhood diarrhea. The study was developed in Leon, Nicarágua. The conclusion is that the statistically significant decrease in the duration of diarrhea in the treatment group suggests that homeopathic treatment might be useful in acute childhood diarrhea and that further study of this treatment deserves consideration. The story behind one of the highest quality studies ever published on individualised homeopathic treatment, published in the conventional medical journal.