Jack Osbourne - Jack Osbourne Has Multiple Sclerosis - What Does It Mean For Him?

The Guardian reports that MS is a neurological condition affecting some 400,000 people in the United States and 2.5 million worldwide. The disease affects the central nervous system which affects the brain and spine and optic nerves, which is why Osbourne's early symptoms of problems with his eyes are completely explainable.

There has been no concrete theory as for why people develop MS, but one idea is that it comes to a lack of Vitamin D, with many in the northern hemisphere more likely to get it that in the southern hemisphere. Scotland, for instance, has a high proportion of MS sufferers in a place where sunlight is notoriously weak. In 85 per cent of people, MS begins in what is known as the relapsing, remitting form - symptoms, which can include balance problems, dizziness and spasms, come and then go either partially or completely. However, that can turn into a secondary progressive disease, where there is no respite from the build-up of disability. A minority go straight into primary progressive disease, skipping the remission phase.