Shereese Hickson's multiple sclerosis was flaring again. Spasms in her legs and other symptoms were getting worse.
She could still walk and take care of her son six years after doctors diagnosed the disease, which attacks the central nervous system. Earlier symptoms such as slurred speech and vision problems had resolved with treatment, but others lingered: She was tired and sometimes fell.
This summer, a doctor switched her to Ocrevus, a drug approved in 2017 that delayed progression of the disease in clinical trials better than an older medicine did.