<qa>  How many people suffer from seasonal allergies?It is estimated that 36 million Americans suffer from seasonal allergies and that ragweed is the primary cause of autumn allergies, 87 of patients with ragweed allergy suffer rhinoconjunctivitis. ToleroMune Ragweed is a novel, synthetic, allergen-derived peptide desensitising vaccine, currently being developed for the treatment of ragweed allergy. 