A member asked:

Iis there anyone who has multiple sclerosis and taking tysabri (natalizumab)?

3 doctors weighed in across 2 answers

Tysabri (natalizumab): I dont know the numbers but there are several patients who are taking injections of tysabri (natalizumab).

Answered 3/18/2013

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Possibly 70,000: Don't have the exact numbers, but I have been informed of 65-70, 000 world-wide currently.

Answered 7/8/2012

5.7k views

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