The CDC Suddenly Changes the Definition of ‘Vaccine’ and ‘Vaccination’

By Nick Arama, Red State

Matt Margolis over at our sister site PJ Media has picked up on a very interesting change on the CDC website when it comes to the definitions for “vaccine” and “vaccination.”

The timing of the change is very interesting.

He notes that it would appear that the CDC is trying to change how we understand the concept of vaccinations.

He highlights the definition of terms on August 26, 2021.

Immunity: Protection from an infectious disease. If you are immune to a disease, you can be exposed to it without becoming infected.

Vaccine: A product that stimulates a person’s immune system to produce immunity to a specific disease, protecting the person from that disease. Vaccines are usually administered through needle injections, but can also be administered by mouth or sprayed into the nose.

Vaccination: The act of introducing a vaccine into the body to produce immunity to a specific disease.

Immunization: A process by which a person becomes protected against a disease through vaccination. This term is often used interchangeably with vaccination or inoculation.

That had been their definition since at least May 16, 2018, according to PJ Media.

But then, come September 1, suddenly there was a big change.

Immunity: Protection from an infectious disease. If you are immune to a disease, you can be exposed to it without becoming infected.

Vaccine: A preparation that is used to stimulate the body’s immune response against diseases. Vaccines are usually administered through needle injections, but some can be administered by mouth or sprayed into the nose.

Vaccination: The act of introducing a vaccine into the body to produce protection from a specific disease.

Immunization: A process by which a person becomes protected against a disease through vaccination. This term is often used interchangeably with vaccination or inoculation.

Why are they trying to back off of what the definitions used to be? Now they are talking about a vaccine stimulating the immune response but not to “produce immunity.” Now they’re saying a vaccination doesn’t produce immunity but will “produce protection.”

Thomas Massie
Check out @CDCgov’s evolving definition of “vaccination.” They’ve been busy at the Ministry of Truth:


They appear to be changing the definition to fit what we’re being told about the COVID-19 vaccines — that they don’t necessarily provide immunity but just “protection” from more serious illness. Meanwhile, it fits with the push for more “booster” shots, to keep up the continued “protection.” So they’ve changed the definition of vaccines so that it no longer means preventing the disease or producing immunity. Whereas before it wouldn’t necessarily meet their definition of a vaccine, now it meets the new definition.

We’ve seen the CDC have wrong (bigger) numbers for COVID deaths in Florida (what a coincidence). We’ve seen them falsely claim that the Delta variant is as contagious as chicken pox. Now we see them redefining words to better fit what they’re pushing with the COVID “vaccine.” Is this one more effort to control the narrative?

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Hal Carter

We have been told for years that a “Virus” cannot be killed and that there is no vaccination that will provide immunity from a Virus. Viruses are different from Bacteria. According to Merriam-Webster Dictionary: “While both can cause disease, viruses are not living organisms, whereas bacteria are. Viruses are only “active” within host cells which they need to reproduce, while bacteria are single-celled organisms that produce their own energy and can reproduce on their own. Bacteria serve many vital roles in nature outside of being infectious.” Example, there is no cure for the common cold created by a virus. Conclusion : Vaccinations to kill and create immunity against non living organisms (Virus) won’t work. Government control using fear.



Looks like Hal Carter flunked high school biology.

I wonder how he thinks all the other vaccines that protect HIM from viral disease work. Stupid and ungrateful.


Viruses are not living organisms. Are you disagreeing with that?

Jeffrey Mahan

Then why don’t you get the measles or polio? How did you actually write that response with a straight face?


Some journalist should ask which “vaccines” have proven less effective than these for COVID?

If these “vaccines” don’t produce immunity, but protection… they sound like… condoms… errrr… contraception. So they’re not vaccines but COVID contraceptives. Used to diminish the likelihood of COVID.

They’re far, far, far less effective than contraceptives used to prevent pregnancy… and they come with serious, even fatal side effects.

Think if birth control was let out on the market with this type of record of failure and injury?


[…] September 1 the US Centers for Disease Control and Prevention (CDC) quietly changed their definition of vaccination, from pre-2015’s ‘in order to prevent the disease’ and the […]


[…] immunity against a specific disease to one that stimulates the immune system against diseases. Citizens Journal included both the previous and new definitions of vaccine on CDC’s website to point out the […]

Ken Shields

I can’t find the original source document with the changed definition. Anybody got a link?


[…] “Vaccine: A preparation that is used to stimulate the body’s immune response against diseases.” [13] […]


This is insanity! I heard on a radio show off a popular lefties jedi yesterday… They were arguing about Aaron rodgers why claimed he was vaccinated but still caught cocks. Which of course l can happen! Because nothing they were officially saying it’s real! One of the co-hosts says” yeah, but be said he got inoculated” you could hear the gaspñ the other two co-hosts jumped real quick to fix his words. Immunized, yeah yeah vaccinated. Asu that point the guy backtracks and says he’ll your right. Inoculation is what my grandma used to do, or something like that, he treated the word as if it were outdated and wrong.
They are attempting to change reality as we go in and effort to bottom line hey whatever they want… Even if it doesn’t make sense l! Move if this makes sense


OK here’s one for the conspiracy theorists camp.

Say I was intending to commit mass genocide (like never seen before) on the worlds population by releasing a lab-made virus. Surely I would want to be targeting the haters, the individual’s who will rebel and become a tyrant to the new world.

So why not allow the people who can be controlled much easier, the opportunity to take a Covid vaccine to protect (immune) themselves from the impending ‘fatal’ lab-made virus that will be unleashed on the population in the very near future and which will secure the fate of the unvaccinated.

This way, we come to the same conspiracy goal of greatly reducing the population, but without any obvious finger of blame, as everyone would believe they only had themselves to blame for not following the guidance.

A conspiracy within a conspiracy.


John, this much more plausible then a vaccine for a 99% survival virus.


Its 2021, no plausible theory is off the table. Maybe its the same with masks.


[…] Vaccines now do not need to provide ‘immunity’ but just ‘protection’. [1] […]


[…] Vaccines now do not need to provide ‘immunity’ but just ‘protection’. [1] […]


[…] up until August 26, 2021, the CDC didn’t consider it a vaccine either. Up until that point they defined a vaccine as, “A product […]


They have never been able to isolate the virus therefore making all of this illegal and are considered crimes against humanity.


“FU” cdc and all your gov. agencies with you!!!


FU are the only initials I trust.

No, thanks

Apparently there are different definitions. Here’s one that has further info on different vaccines and their actions
However, the CDC isn’t as forthcoming.

Also found in: DictionaryThesaurusAcronymsEncyclopediaWikipedia.
Related to vaccine: HPV vaccinePolio vaccine

vaccine [vak-sēn´] 
a suspension of attenuated or killed microorganisms (viruses, bacteria, or rickettsiae), administeredfor prevention, amelioration, or treatment of infectious diseases.


The mRNA substance is NOT a vaccine as it was previously defined (pre-2015). This is part of the scam. Change the ground rules. Now you can inject a “substance” to trigger an immune response. So in essence, if I want to inject Windex to get a response it becomes a vaccine. Anything you inject triggers an immune response!!! So bug bites are vaccines, now?!! This is so outrageous. I can’t believe this has not been fought.

larry g hesseltine

true, and I do not need bugs or windex to live.

not disclosing

thank you for the real information

kim shuler

My sister, brother, and I all had to have vaccine booster shots for the measles vaccine back in 1977 when a cousin of ours came up to North Carolina from Florida for a visit and brought her son who was infected with measles. My siblings and I had all had the initial vaccines but not the boosters. They caught the measles, I did not, because I was living in a college dorm at the time, less than a mile away. I got the booster at the health department. Their pediatrician made the call to give them theirs, too, just in case, I think. So boosters have been around for awhile.


The difference is that the measles vaccine IS a true vaccine. The covid shot is NOT a vaccine despite them calling it that. It does NOT give immunity, it does NOT keep you from catching it, it does NOT keep you from spreading it and the jury is still out on whether it offers any protection at all. Considering 98%-99% of people who DO get Covid recover without issue…how will we ever know that the vaccinated who catch Covid wouldn’t have recovered in the exact same way without the vaccine? The answer is we won’t ever know.


They also changed the definition for ‘pandemic” & “herd immunity” too! All to fit the scam.


does anyone have a source to this via CDC?


Why don’t you do your own research?


Dont be a dick.

bide is a thief

do your own research lazy ass


If you get the polio vaccine, you will not get polio. If you get the rubella vaccine, you will not get rubella. If you get a flu shot, you may still get the flu. If you get a COVID shot, you can still get COVID. I think we know what a vaccine is…. these COVID shots are not vaccines.


flu and covid ‘vaccines’ are obviously the way to keep billionaires…billionaires

James Davison

Correct, the covid jabs are NOT VACCINES! By definition, a vaccine contains a small component of the virus. The Covid shot does not contain the virus to create immunity…
Of note, if you are a “Right to Life” believer, you should know that aborted fetus stem cells are part of the J & J Covid “vaccine!”


Polio came back BECAUSE OF THE VACCINES. Man you people


The CDC just shot themselves in the foot, with this one. They want to play WORD GAMES…….and they just LOST! Changing ‘immunity’ to ‘PROTECTION’ is a win for HUMANS! Now, with the ‘PROTECTION’ definition, Vitamin C is now a ‘vaccine’ for Scurvy (as an example). Vitamin C gives one PROTECTION FROM SCURVY. SO, all of the vitamins, clean water and CLEAN FOOD that I consume are now ‘vaccines’ against the ‘big, bad virus’, since those PROTECT ME from getting sick. (I haven’t had the Common Cold in more than 10 years!) 
I, for one, welcome the ‘new definition’ because it now defines the things that I do to PROTECT myself from colds/flu as ‘vaccines’. 


Let’s go ahead and use your definition and quantify the effectiveness of each of your “vaccines”

Level of ‘PROTECTION’ from COVID:

Pfizer vaccine: 94% (77% Delta variant after 6 months)
Moderna vaccine: 93% (92% Delta variant after 6 months)
J&J vaccine: 68%
Vitamins: ~0%
Clean Water: ~0%

Yeah, they’re all the same. Good put DawnieR.


You have that all backwards, sweetie. And you might just want to READ….#1 these Bio-weapon makers OWN PUBLICATIONS, and #2 what REAL Doctors and REAL News are reporting.


Pfizer: 0%
Moderna: 0%
J&J: 0%
Vitamins: 100%
Clean Water: 100%
Clean Food: 100%

So, please explain to me, if these EXPERIMENTAL (BIO-WEAPON) INJECTION(S) ‘protect’ SO WELL……WHY is it that 75% to 99% of those NOW GETTING ILL are those who HAVE BEEN INJECTED??? And the remaining %, getting ill, who have NOT been Injected, are getting sick FROM those who HAVE BEEN INJECTED?! It IS the INJECTED who are now getting ill….AND…..INFECTING (aka Super Spreaders) those who have NOT been injected! Those are what we call INDISPUTABLE FACTS. Israel is the PERFECT ‘Indisputable Facts’ example. MOST of that country is now SICK…..BECAUSE they had been Injected. And they ARE DYING.

ALL of the REAL Doctors, who are being CENSORED (gee….if these EXPERIMENTAL INJECTIONS work SO WELL, then WHY do they NEED to CENSOR OTHERS??), are all over the NO CENSOR video/social media sites. Brighteon, Bitchute, Rumble, Gab video, ect.
Any SANE individual would be taking the info from REAL Doctors, vs the QUACKS being PAID by Big Pharma (& Govts) to MURDER people. The GOOD thing about these Experimental (Bio-Weapon) Injections? Is that the Low IQ have all gotten them, and will be MURDERED (die) by these injections in the near future. We now find ourselves in this TYRANNICAL MESS, that the planet is now in, BECAUSE OF Low IQ Individuals; retarded 3 year olds who CLAIM to be ADULTS, that have NO CLUE what is going on around them!


As far as I know, the Pfizer protection against disease is less than 40% – based on Israel data and before 3rd dose. And of course all the people that previously have had covid and were vaccinated – rise the overall effectiveness of all covid vaxes.
About Moderna and J&J ‘vax’ – lets give at least one year to discuss the real effectiveness, as, besides Israel, other countries haven’t used one particular vaccine…

About clean water and food and vitamins – let’s check, if the vaccine will save you, when you will not use clean water, clean food and will not use vitamins, ok? Actually there is one simple way to do mental excercise – look at the list of poor countries, where is lack of clean water/food and therefore – vitamins and ask yourself – is there the morbidity/mortality rate higer, or lower than in countries with higher income?


Yawn. Tell it to another conspiracy monger. I’m sticking with facts, data, and reality.


Reality aka what the news tells you


No, I mean reality. Truth. The opposite of the lies OAN and Citizens Opinion tell you, YuTwat.


Reality aka what your conspiracy website tells you


Brought to you by Pfizer.

Bob M

Stop watching the bs on CNN, NBC, ABC, CBS, or reading The Atlantic Mag. etc. They are the masters of propagada by keeping us in fear. History all over again. They are paroting the exact same narative from the DNC and idiots like Gates, Soros, and the late night talk shows that can only hate Trump and make fun of the salt of the earth silent Majority. Get some perspective from Brighteon, Parler, Mark Dice on YouTube, Gab, and 95 more sites if you do a search for top 100 conservative websites on Duckduckgo or even Google. but I’m surprised they haven’t kicked Dice off. You will be amazed if you just open your mind to the possibilities of what is really happening but be warned, it’s so surreal you won’t believe it. The good news is the word is getting our to the masses and people are changing their opinions slowly but surely. The Dems are scared shitless their New World Order will crash. We are definately headed towards WW III. Get your act together asap or you won’t have an act. Best of Luck to you and all of us to keep our way of life and not be taken over by the Chinese and real foreign and domestic enemies. it’s all as real as you can only imagine. Right now there’s 2 basic groups of people in the US. People who know and People who don’t know(and worst of all they think they do!!)


I’m not scared. Must only be you, Snowflake.

You need to do a lot more research you dolt.

George Pattone

Yep… One big Psyop to control the narrative for the medical tyranny Trojan horse that Communism rides in on…


Everything goes to keep the narrative/agenda going… Over- and Under reporting of covid cases/deaths and taking away constitutional rights (etc.) to push vaccination of the whole population of which not even 1 percent is at risk for this virus (and vaccination will keep this fake ‘pandemic’ going forever). Should be obvious by now, but it isn’t. AMAZING!


Yes, because the U.S. government has never decided to do unethical things to U.S. citizens. Have you ever looked up the Tuskegee experiments? You underestimate the evil that lives in this world, it is organized and it doesn’t care about anyone.