Home > Allergy > Anaphylaxis Twice as Common As Previously Reported Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Dec 09, 2008 by WDecker, Views: 6682 A new Mayo Clinic study shows that anaphylaxis is two times more common than previously reported. The increase prevelance appears to be because of better reporting of anaphylaxis, rather than an increase in the occurrence anaphylaxis.