Researchers are testing CAR T cell therapy as a way to reset the immune system. At age 49, Jan Janisch-Hanzlik’s multiple sclerosis was destroying her freedom to live the life she wanted. She gave up her active nursing job for a desk role. Frequent falls made her afraid to carry her grandchildren. She had to move to a bigger house to make room for the wheelchair she feared she might end up needing full-time. Even the best available medication wasn’t improving Janisch-Hanzlik’s symptoms, and she ...