对于那些没有CSYNC信号的显卡来说，可以设计一个生成CSYNC信号的电路(请参阅参考资料)，但是通常购买一个具有这种信号的显卡更加容易。

You can build a circuit that generates a CSYNC signal for CARDS that don't do this already (see Resources), but it is generally easier to just purchase a card that already generates it.

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尤其需要关注的方面包括各国的资料传输、资料质量的保证以及资料的处理和分析，并包括及时发现疫苗安全问题的“信号”和采取行动。

Aspects in particular need of attention include data transmission by countries, assurance of data quality, and the processing and analysis of data, including timely signal detection and action.

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要了解有关信号的更多信息，请查阅本文的参考资料一节以获取一些不错的链接。

To learn more about signals, check out the Resources section of this article for some good links.

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