a rare hereditary disorder affecting the central nervous system , especially the areas responsible for movement coordination of limbs, facial muscles, and eyes
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A communicable disease is one that one person can catch from another person. The flu is one such disease. A noncommunicable disease is one that one person can not catch from another. Cancer is one such disease.
The probability isP(you have the disease)*P(the test shows positive when testing someone with the disease) +P(you don't have the disease)*P(the test shows positive when testing someone without the disease).The second category is particularly important if the disease is rare but the probability of a type II error is large.
Sickle Cell Disease can be found in patients of any nationality or decent. Both parents must carry the recessive gene for this disease, and only then their offspring have a 25% chance of inheriting the disease. Those of African decent have approximately an 8% chance of inheriting the disease, Hispanics have about a 0.07% chance of inheriting the disease, and whites have roughly a 0.001% chance of inheriting the disease.
# of new cases of a specified disease in a population / population at risk for getting the disease
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