Niven /niv-en/ [2 sylls.] as a boys' name. Niven's root is Latin, and the name Niven means holy, sacred; little bone; servant of the saint's disciple. Niven is a variant transcription of Nevin (Latin).
The average life expectancy for someone with MS is 35 years after the symptoms begin. This represents a life expectancy of 95 percent of someone who does not have multiple sclerosis. Most people with the disease can function effectively; however, a rare form of acute MS can be fatal within weeks.
Sickle cell disease is a life-long illness. The severity of the disease varies widely from person to person. In high-income countries like the United States, the life expectancy of a person with SCD is now about 40â60 years. In 1973, the average lifespan of a person with SCD in the United States was only 14 years.