The blood brain barrier keeps bad actors like toxins, viruses, and bacteria from entering the brain. But in the case of brain cancer when the danger is already inside, the blood brain barrier can work against a person’s health by shutting out the medications meant to eliminate the threat. Dr. Sadhana Jackson from the National Institute of Neurological Disorders and Stroke (NINDS) works to figure out ways to selectively get cancer treatments through the blood brain barrier to treat patients with certain types of brain tumors known as gliomas. Learn more about Dr. Jackson work at https://irp.nih.gov/pi/sadhana-jackson.