Prevalence and Incidence of Norwalk-like viruses


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About prevalence and incidence statistics: The term 'prevalence' of Norwalk-like viruses usually refers to the estimated population of people who are managing Norwalk-like viruses at any given time. The term 'incidence' of Norwalk-like viruses refers to the annual diagnosis rate, or the number of new cases of Norwalk-like viruses diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

Incidence (annual) of Norwalk-like viruses: estimated 181,000 cases annually in USA (CDC-OC)
Incidence Rate: approx 1 in 1,502 or 0.07% or 181,000 people in USA [about data]
Prevalance of Norwalk-like viruses: An estimated 181,000 cases occur annually. 1

Footnotes:
1. excerpt from Facts About Norwalk-like Viruses: CDC-OC

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