但如果某人以为自己服用的是心脏药，药物却未含有效成分，我们认为那就是威胁。

But if someone believes they are taking a heart medicine, but it has no active ingredient, we say that is a threat.

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不过，药物的成分不一，有些内含有效成分，其他则否，甚至含有如硼酸之类的有害成分。

But the contents of the drugs vary. Some contain active ingredients, but others contain no active ingredient or even harmful ingredients such as boric acid.

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通过这些试验，将能够更好地了解一个人需要多少剂疫苗才能获得免疫，以及每剂疫苗中必须含有多少有效成分(抗原)。

These trials will give a better idea of the number of doses required for a person to be immunized, as well as of the quantity on active principle (antigen) needed in each vaccine dose.

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