Objective: To determine tolerance to various risk scenarios associated with current MS therapies. Methods: People with MS from the North American Research Committee on Multiple Sclerosis (NARCOMS) Registry’s online cohort and the National Multiple Sclerosis Society were invited to complete a questionnaire on tolerance to real-world risks associated with a hypothetical therapy. Multiple risks levels were presented including, skin rash, infection, kidney injury, thyroid injury, liver injury, and PML. Results: Both progressive multifocal leukoencephalopathy (PML)...