Black and African Americans Connections to Parkinson's Disease (BLAAC PD)

Inclusion Criteria for Control Participants: * Ability to provide informed consent * Age 50 years or older * Self-identify as Black or African American Exclusion Criteria for Control Participants: * Diagnosis of Parkinson's Disease and/or neurological condition * Familial history of PD and/or neurodegenerative or psychiatric conditions * Unknown family history of PD and/or neurodegenerative or psychiatric conditions * Any conditions that, in the investigator's opinion, preclude the individual's ability to carry out study activities * If submitting a saliva sample, nothing by mouth (food, drink, gum, tobacco, or smoking) for 30 minutes prior to sample collection Inclusion Criteria for Participants with a Diagnosis of PD: * Ability to provide informed consent * Age 18 years or older * Self-identify as Black or African American * Meet the Movement Disorder Society's clinical diagnostic criteria for Parkinson's disease Exclusion Criteria for Participants with a Diagnosis of PD: \- If submitting a saliva sample, nothing by mouth (food, drink, gum, tobacco, or smoking) for 30 minutes prior to sample collection