Long-Term Outcomes and Durability of Effect Following Treatment With Cladribine Tablets for MS (CLASSIC-MS)

Inclusion Criteria:

Participants with relapsing remitting multiple sclerosis (RRMS) randomised in CLARITY/CLARITY-EXT clinical trial(s) who have received greater than or equal to (>=) 1 course of in investigational medicinal product (IMP) Cladribine Tablets or placebo
Participants with their first clinical demyelinating event randomised in ORACLE MS clinical trial who have received >= 1 course of IMP Cladribine Tablets or placebo
Participants who has sign informed consent which includes compliance with the requirements and restrictions listed in the informed consent form and this protocol

Exclusion Criteria:

Participants who has any uncontrolled disease state other than MS, that in the Investigator's opinion, constitutes an inappropriate risk or a contraindication for participation in the study or that could interfere with the study objectives, conduct, or evaluation
For study participants at selected sites where MRI assessment will be conducted following exclusion criteria will apply to MRI assessments only:
Female study participants who are pregnant
Participants who are taking Cladribine Tablets as part of another study at the time of the start of this study