"I see a neurologist every six months, have access to disease modifying treatment drugs and easy access to my MS nurse, who I can see in 15 minutes if I need to, " he said.

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Since it may be disease-modifying, many physicians suggest it be continued even when there is no clinical improvement.

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Forty-one per cent of those who said they did have enough information about drug treatments still did not take a disease-modifying treatment.

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That, he says, is exactly what would be needed for the drug to be approved by the Food and Drug Administration as a disease-modifying agent, not just a treatment of symptoms.

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Disease-causing bacteria such as Salmonella survive by modifying these bags in order to avoid these attacks and to multiply.

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The treatment involves taking a patient's T-cells, the infection- and disease-fighting cells of the immune system, and genetically modifying them to target a protein called CD19, which is present on ALL cells.

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