CDC = Convenient Definition Changes

The CDC should change its name to Convenient Definition Changes. Or Center of Definition Changes?


This month, the definition for a vaccine is to “stimulate the body’s immune response against diseases”, and vaccination is the “act of introducing a vaccine into the body to produce protection from a specific disease”. See Figure 1.

Figure 1: CDC website, 16 September 2021.
Figure 1: CDC website, 16 September 2021.

Presumably before 1 September 2021 (since that was when the page was last reviewed), a vaccine was a product that “stimulates a person’s immune system to produce immunity to a specific disease, protecting the person from that disease”, and vaccination is the “act of introducing a vaccine into the body to produce immunity from a specific disease”. See Figure 2.

Figure 2: CDC website, 26 August 2021.
Figure 2: CDC website, 26 August 2021.

To go back even further, presumably before September 2014, a vaccine “produces immunity therefore protecting the body from the disease”, and vaccination is an “injection of a killed or weakened infectious organism in order prevent disease”. See Figure 3.

Figure 3: CDC website, 9 July 2014.
Figure 3: CDC website, 9 July 2014.

Right.


So, in terms of a vaccine, we’ve gone from “produces immunity” to “stimulates a person’s immune system to produce immunity to a specific disease” to finally just “stimulate the body’s immune response against diseases”.


And in terms of vaccination, we’ve gone from containing dead or live-attenuated organism to that which “produce immunity” to finally just “produce protection”. Also note the use of “preparation” instead of “product”.


It’s all very reassuring.

 

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