The decision for ofatumumab as routine medical treatment must be taken independently of and prior to the study start. During the observation phase of the study, data will be collected according to standard of care as recommended by KKNMS (Competence Network Multiple Sclerosis in Germany).~The prospective observational period per patient will be up to approx. one year from the time of consent (1 year ± 2 months visit window + potentially 6 months follow-up to confirm disability worsening in patients who showed increase in EDSS within 6 months prior to EOS). The observational period will not be dictated by the protocol. The follow-up documentation will take place at a frequency defined as per investigator's discretion. The diagnostic or monitoring procedures are only those ordinarily applied to the therapeutic strategy and to routine clinical care, can be performed as telemedicine visits and will take place as per investigator's discretion.
KAIROS is a prospective, multicenter, non-interventional study (NIS) in Germany. Prospective, primary data will be collected via questionnaires and an electronic case report form (eCRF) over a period of one year (max. 1.5 years) of treatment. Additionally, medical history of participants will be collected including disease duration, EDSS, MRI parameters and relapses.