Patients 
À quelle fréquence l’anaphylaxie survient-elle ?
L'anaphylaxie reste, en principe, assez rare. Elle concerne environ 2 % de la population. Les données et chiffres exacts concernant l'anaphylaxie sont très limités. On estime qu'environ 0,05 à 2 % de personnes sont confrontés à l'anaphylaxie pendant leur vie.
On estime que, chaque année, dans le monde, environ 1 million de cas d'anaphylaxie surviennent à cause du venin d'insecte, 0,4 million de ces personnes ayant moins de 44 ans. Les réactions allergiques suite à des allergies alimentaires touchent pas moins de 6 % des enfants. Les allergies alimentaires sont la cause la plus courante d'anaphylaxie chez les enfants. Certaines denrées alimentaires sont la cause de plus de 80 % des réactions allergiques chez les enfants. Les réactions allergiques aux médicaments et au venin d'insecte sont plus fréquentes chez les adultes.
Anaphylaxis is a relatively common problem, affecting up to 2% of the population. Data on frequency are limited; however, it is estimated that approximately 0.05% to 2% of people will experience an anaphylactic episode during their lifetime.
There is some data to suggest a rising occurrence of severe allergic reactions over the last decade. Hospital admissions in the UK due to anaphylaxis were seven times more frequent in the year 2003 to 2004 as compared with data recorded for the period 1990 to 1991, while food allergy admissions were five times more common.
It is estimated that there are around 1 million cases of venom anaphylaxis and 0.4 million cases of nut anaphylaxis every year worldwide among people aged up to 44 years.
Allergic reactions to food affect as many as 6% of children, and food allergy is the most common cause of anaphylaxis in children, accounting for over 80% of allergic reactions. Allergic reactions to medicinal products and insect venom are more common in adults.