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.
When diagnosed with a viral infection expect the infection to last 7 to 10 days unless the virus is specifically identified as one that can cause a longer infection period. slide 4 of 4.
How long does a sinus infection last depends on the type of sinus and the real cause of the infection. There are four main types of sinusitis based on how long a personâs symptoms have been present. Within these categories, there may be more specific types. Each type of infection has its own symptoms and signs. Below are the four main types of sinus infections with an explanation of how long does a sinus infection last.