There are two types of routine testing: opt-out and opt-in.

常规检测有两种：选择退出或选择参加。

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Moreover, routine testing for pandemic influenza is costly and demanding, and beyond the reach of most countries.

此外，常规检测大流行性流感需要较高的费用和技能，超越了多数国家能力可及的范围。

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In an increasing number of countries, including the UK and many US states, routine testing is now offered on an 'opt-out' basis.

在越来越多的国家，包括英国和美国的许多州，常规检测建立在一个'选择退出'的基础上。

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The call for routine testing is growing in the U.S., as NPR's Brenda Wilson reports.

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The routine testing of pregnant women in the countries covered by the report is also expanding.

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And the American Cancer Society does not support routine testing for prostate cancer, according to its Web site.

CNN: Preventive care not always cost effective, experts say