Please read the entire article! The pulmonary embolism occurred with a woman who had an open cyst. They injected and cleaned the area under pressure with hydrogen peroxide, thus getting hydrogen peroxide into her bloodstream. Because of their experiment on mice, it was concluded that the embolism occurred because of introduction into her bloodstream through pressure, rather than capillary absorption. It would seem that if there were no cuts inside the vagina and hydrogen peroxide was introduced and allowed to run out after a minute, it would not go directly into the bloodstream and minut amounts might be absorbed through capillaries in the thin vaginal walls. These are entirely two different procedures, & 2 methods of using hydrogen peroxide. It would likely be safe to use if one could be assured that there are no cuts on the inside of the vagina.