A Milwaukee medical examiner has found that an antihistamine overdose, not a reaction to the HPV vaccine, caused the tragic death of a 12 year old girl there last June.

The girl’s mother, Rebecca Prohaska, told the news media in early August that she believed her daughter may have had an allergic reaction to the human papillomavirus vaccine, also known as HPV, about six hours after the vaccine was administered in a doctor’s office.

The mother’s speculation was reported by several television stations and the Journal Sentinel, and was picked up by opponents of childhood vaccinations across the country as inaccurate evidence that the vaccine can kill.

The HPV vaccine, given in three doses starting at age 11 or 12, is the only vaccine currently available to prevent any type of cancer. HPV vaccination is recommended by the Centers for Disease Control and Prevention, the American Academy of Family Physicians, the American Academy of Pediatrics, and the Society for Adolescent Health and Medicine.