Chapman is the mother of two daughters and a son with regressive autism, seizures, apraxia, gastrointestinal and esophageal inflammation. She dedicated years to environmental, medical and education research, advocacy and activism. Chapman has met with many state and federal legislators to educate them on the autism epidemic, the medical co-morbidities that go undetected and the medical needs of the community. She has testified and advocated for parental rights, and fought to reinstitute a respect for parental observations as an integral part of the medical discovery process. Chapman is currently on the Board of the Canary Party.