Multiple system atrophy (MSA) is a degenerative neurological disorder. MSA is associated with the degeneration of nerve cells in specific areas of the brain.he cause of MSA is not conclusively known and no specific risk factors have been identified, although research indicates that a prion form of the alpha-synuclein protein may be the cause of the disease. Around 55% of cases occur in men, with typical age of onset in the late 50s to early 60s.
1 Generally, someone who has a MRSA infection stays infected for just under 10 days if they are treated by a doctor although many factors are involved and this duration can vary from person to person.
How long does the flu last? As harsh as the flu can be, the good news is that most people feel much better within one to two weeks. Most healthy adults become contagious the day before symptoms develop (which makes it trickier to prevent from spreading). They remain infectious for up to five to seven days after symptoms appear.