Yolanda Foster feels it is her duty to find a cure for Lyme disease. Yolanda Foster is determined to find a cure for Lyme disease. Yolanda Foster Takes On 'Toxic-Free' Lifestyle While Battling Lyme Disease Three years after her diagnosis, the Real Housewives of Beverly Hills star continues to fight back against the illness, and according to her husband, she's going to do whatever it takes to beat the disease and help others do the same.