This summer, the US has seen an unusual outbreak of enterovirus, a big, diverse group of viruses that can cause illnesses ranging from summer colds to polio and hand, foot, and mouth disease.

今年夏天，美国爆发了次不寻道病疫情， 这是大类多样化病，起从夏季感冒到小儿麻痹症和手足口病等多种疾病。