“盐水安慰剂”从未在 Salk 疫苗试验中使用过。

下面的页面来自 Salk 试验的官方最终报告，该报告明确解释了该试验中对照组接受了什么。

那是一种注射液，其中包括以下成分：“199 溶液”（一种合成组织培养基和乙醇）、“酚红”、“抗生素”和“福尔马林”。（不要相信我的话，自己查看完整报告：网页链接）

另请注意，FDA 在其关于安慰剂试验的指导文件中指出：“安慰剂，被定义为无药理活性的惰性物质……”以及“安慰剂对照……组……接受惰性治疗……”或者如 CDC 解释：“一种对生物体无影响的物质或治疗。”有关来源链接及更多信息，请见 网页链接

A "Saline Placebo" was never used in the Salk vaccine trial.

The below page is from the official final report for the Salk trial that expressly explains what the control group received in that trial.

It was an injection that included, among other things, the following ingredients: “199 solution” (a synthetic tissue culture medium and ethanol), “phenol red,” “antibiotics,” and “formalin.” (Don’t take my word for it, see the full report for yourself: 网页链接)

Also note that FDA, in its guidance regarding placebo trials, states: “Placebos, defined as inert substances with no pharmacologic activity…” and that a “placebo control … group ... receives an inert treatment…” Or as CDC explains: “A substance or treatment that has no effect on living beings.” For source links and more see 网页链接 and网页链接