IFNG and Allergy: Although high levels of IFNγ has been associated with exacerbated symptoms of asthma in humans and mice41, the importance of this cytokine in allergy prevention was demonstrated for example in the study by Brand et al. who could show that the farm-derived bacterial strain Acinetobacter Iwoffii F78, prevented the development of allergy in IFNγ-dependent manner42.