Therapies are currently available for relapsing-remitting MS, secondary progressive MS and progressive relapsing MS.

目前有针对复发-缓解型，继发-进展型，与进展-复发型多发硬化症的治疗方案。

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The most common type is relapsing-remitting MS, in which patients experience attacks of symptoms such as muscle weakness and spasms followed by periods of symptom-free remission.

最常见的类型是“复发-缓解型多发性硬化”，即病人在症状发作后，如肌无力和肌痉挛，有一段症状完全缓解的期间。

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They can reduce the incidence of relapse or extend time between relapses in the relapsing-remitting form of MS but symptoms are not changed by the drugs.

它们能够降低医学倒退的发生率或者延缓倒退-抵消相转换的医学形式，但是，药物并不能够改变这些症候。

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The United States Food and Drug Administration has approved 3 forms of beta interferon for treatment of Relapsing-Remitting MS.

VOA: special.2009.01.06

Eventually relapsing-remitting MS can become progressive MS as the good spells become shorter and less frequent.

BBC: Multiple sclerosis: New drug 'most effective'

When the condition is diagnosed most will have a form of the disease know as relapsing-remitting MS, in which the symptoms can almost disappear for a time, before suddenly returning.

BBC: Multiple sclerosis: New drug 'most effective'

Beta-interferon has also been shown in studies to benefit to those with "relapsing-remitting" MS, in which the sufferer's condition is stable in between "attacks", which prove gradually more disabling.

BBC: MS drug 'should be restricted'