If the results are normal, Pap smears should be done every 3 years until age 30 years.

如果检查结果正常，建议每3年接受一次巴氏涂片检查，直至年满30岁。

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Additionally, there are an estimated 4.7 million abnormal Pap results that require follow-up each year in the United States. At least 3 million of these results are caused by some type of HPV.

另外，在美国每年大约有四百三十万巴氏试验异常者需要随访，至少其中的三百万是某种亚型的HPV引起的。

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