Hillsdale Daily News HILLSDALE - One in five Americans has a diagnosed allergy, with more than 50 percent saying the condition affects their daily quality of life. Experts predict allergy season to be exceptionally severe this spring, according to the Allergy and Asthma Network. Rising global temperatures and a forecast of warm, dry air this spring after a winter of heavy snow in some areas could significantly increase pollen production. This comes after a year many people spent mostly indoors in quarantine. Since May is Allergy and Asthma Awareness Month, experts say now a good time to increase understanding of both conditions and ways to control troublesome symptoms. Dr. Gina Lynem-Walker, associate medical director at Blue Cross Blue Shield of Michigan, said Michigan ranks in the top 10 states for lifetime prevalence of asthma.