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Diseases » Lassa fever » Prevalence
 

Prevalence and Incidence of Lassa fever

Worldwide prevalence of Lassa fever:

The number of Lassa virus infections per year in West Africa is estimated at 100,000 to 300,000, with approximately 5,000 deaths. (Source: excerpt from Lassa Fever: DVRD)

About prevalence and incidence statistics:

The term 'prevalence' of Lassa fever usually refers to the estimated population of people who are managing Lassa fever at any given time. The term 'incidence' of Lassa fever refers to the annual diagnosis rate, or the number of new cases of Lassa fever 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.

 

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