I wanted to add this morning's experience with my granddaughter.
She was screaming with stomach cramps. Evidently, she got Shigella and/or Salmanella from her school lunch yesterday. I set her up with the standard 7-20-7-20-7 zapping program. By the end of the 1st seven minutes, her stomach pain had lifted completely. She began eating and playing.
{I kept her home from school -- another school closed completely because of Shigella infections -- guess what? the 2 schools had the identicle lunches yesterday.}