Some 50 million Americans have allergies, according to the Asthma and Allergy Foundation of America.

据美国哮喘和过敏基金会统计，差不多有50,000,000的美国人有各种过敏症。

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But making allergy season really unpredictable is the role of weather, said Mike Tringale with the Asthma and Allergy Foundation of America.

CNN: Predicting allergy season eludes experts

According to the Asthma and Allergy Foundation of America (AAFA), this really is the worst allergy season in a number of years.

FORBES: Gesundheit!