About 7% of all Americans suffer from hay fever, an allergic condition that can cause runny nose, sneezing, and teary eyes.

大概7%的美国人在遭受着过敏之苦，过敏病可以引起流鼻涕，打喷嚏和流眼泪。

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Two weeks later she developed joint pain and blisters on her chest and arms, a condition known as Stevens-Johnson syndrome, which can be caused by an allergic reaction to antibiotics.

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