Chicago mother Kristen O’Meara refused to vaccinate her children after doing some extensive Googling and deciding that vaccines cause autism. Now that she, her husband, and all three of her children have gotten sick, she says she feels "really guilty."

According to her appearance on Tuesday's episode of Good Morning America, all three of O'Meara's children contracted rotavirus, which causes diarrhea and vomiting, and is one of the many diseases that are prevented by vaccines. Then she and her husband both came down with it.