The Genetic Information Nondiscrimination Act (GINA) of 2008 also covers situations where genetic information is inadvertently obtained, such as through social media. It prohibits employers from using genetic information in making employment decisions, including hiring, firing, job assignments, and promotions. The hiring manager's decision not to hire the applicant based on a social media post about a family member's diagnosis with Parkinson's disease constitutes a violation of GINA.

References:

Genetic Information Nondiscrimination Act of 2008, U.S. Equal Employment Opportunity Commission (EEOC) website