The American Lung Association (ALA) has issued new guidelines on combating colds and the flu, and one of the keys is being able to quickly tell the two apart.
美国肺脏协会（ALA）已经发布了对抗感冒和流感的新指南，其重要意义之一是能够快速地将两者区分开来。
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The ALA notes that it may be particularly difficult to tell when infants and preschool age children have the flu.
美国肺脏协会指出，判断婴儿和学龄前儿童何时会患流感可能尤其困难。
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Results suggest that topical ALA-PDT is a simple and effective treatment for urethral condylomata acuminata.