This will be prospective, multicentre, observational study. Patients who will initiate treatment with IFNβ-1b (Betaferon) will be followed up to 6 months. Baseline visit (visit 0) i.e. treatment initiation plus four follow-up visits (visits 1-4). For each patient demographics, medical history data, safety parameters, presence of flu-like symptoms and measures to prevent or treat these symptoms will be collected.
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Mean severity score of Flu-Like Symptoms (FLS) recorded within the first 6 months following treatment initiation
Timeframe: 6 months
MS patient with Flu-Like Symptoms (FLS) demographic profile
Timeframe: Up to 1 month
Frequency of usage of particular pharmacological and non-pharmacological practices applied by investigators to prevent or manage FLS
Timeframe: 6 months