Prevalence and Incidence of Arthrogryposis, distal, type 2A
Ophanet, who are a consortium of European partners,
currently defines a condition rare when if affects 1 person per 2,000.
They list Arthrogryposis, distal, type 2A as a "rare disease".
More information about Arthrogryposis, distal, type 2A is available from Orphanet
About prevalence and incidence statistics:
The term 'prevalence' of Arthrogryposis, distal, type 2A usually refers to the estimated population
of people who are managing Arthrogryposis, distal, type 2A at any given time.
The term 'incidence' of Arthrogryposis, distal, type 2A refers to the annual diagnosis rate,
or the number of new cases of Arthrogryposis, distal, type 2A 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.