“Heard immunity n. you heard vaccines work and now you’re immune to any other vaccine information”

“Herd immunity” shouldn’t be confused with “heard immunity,” but there are jokes.
 
“Heard Immunity: You heard vaccines work and now you are immune to any other information 😊” was posted on X/Twitter by Eloa Doner on February 21, 2019. “heard immunity n. you heard vaccines work and now you’re immune to any other vaccine information” (shown on an image) was posted on X/Twitter by Bodhisattvas Betty on April 8, 2025.
 
“Heard immunity” became popular during the COVID-19 (coronavirus) pandemic. “He meant ‘heard immunity’ like have you ‘heard about’ immunity?” was posted on X/Twitter by Samer S. Hamadeh on March 24, 2020. “Heard immunity A loss of credibility that comes from listening to fake news, unsubstantiated commentary and conspiracy propaganda” was entered in the Urban Dictionary on July 30, 2020.
 
 
Wikipedia: Herd immunity
Herd immunity (also called herd effect, community immunity, population immunity, or mass immunity) is a form of indirect protection that applies only to contagious diseases. It occurs when a sufficient percentage of a population has become immune to an infection, whether through previous infections or vaccination, that the communicable pathogen cannot maintain itself in the population, its low incidence thereby reducing the likelihood of infection for individuals who lack immunity.
     
X/Twitter
Cannabis For Autism
@Cannabis4Autism
You heard that joke about the anti-vaxxer guy?
challenges you to explain ‘heard immunity’.
http://fb.me/TSunh8az
6:52 PM · Oct 17, 2015
 
X/Twitter
Eloa Doner
@EloaDoner
Heard Immunity:
You heard vaccines work and now you are immune to any other information 😊
5:34 PM · Feb 21, 2019
 
X/Twitter
Samer S. Hamadeh
@IAmMrBrightside
He meant “heard immunity” like have you “heard about” immunity? Stay the **** at home.
1:11 AM · Mar 24, 2020
 
X/Twitter
life enjoyer
@coolestdudeva
more like heard immunity. Like have you HEARD about this crackpot idea?!
10:27 PM · Apr 15, 2020
 
Urban Dictionary
Heard immunity
A loss of credibility that comes from listening to fake news, unsubstantiated commentary and conspiracy propaganda.
“Believing everything you read on the internet doesn’t make you woke. It just makes you more susceptible to heard immunity.”
by LuLuFromTheBronx July 30, 2020
 
X/Twitter
David Gogginstein
@DGogginstein
Heard Immunity:
When overcome with cognitive dissonance and no amount of truth can debunk what you “heard”.
4-6%
12:48 PM · Oct 18, 2020
       
Urban Dictionary
Heard Immunity
Immunity from believing everything you hear, especially faux news, conspiracy theories and lying politicians.
I was grateful for having “Heard Immunity” after the preacher said people would be having sex with cows if his candidate did not win.
by mlhiss October 22, 2020
   
X/Twitter
Anne Vestibule
@AnneVestibule
You call is “heard” immunity because it’s what you heard in TV 🤣🤣🤣🤣🤣
10:09 PM · Nov 16, 2020
 
X/Twitter
Need more popcorn…
@PopcornMore
So…you have “heard” immunity as in you heard someone say something and you’re immune to listening?
3:11 AM · Dec 5, 2020
 
X/Twitter
Sohan Dsouza
@SohanDsouza
“Heard immunity”
When you lift pandemic restrictions on your town/state, without expert consensus that it’s safe to do so, because you *heard* about some people starting to getting vaccinated.
8:57 AM · Mar 22, 2021
 
X/Twitter
Nick “how’s your book coming?” Danger
@NickFknDanger
Bro, “herd” immunity isn’t a thing. It’s “heard” immunity cuz you “heard” it somewhere.
2:45 PM · Jul 18, 2021
 
X/Twitter
2bytesworth
@2bytesworth
Is heard immunity the one you heard about on facebook?
7:42 PM · Aug 13, 2021
 
X/Twitter
Rob Kingston
@RobKingston5
It’s “heard” immunity because you heard them say it would work
6:24 AM · Mar 7, 2022
 
X/Twitter
Bodhisattvas Betty
@a_bodhisattvas
(The following text is shown on an image.—ed.)
heard immunity
n.
you heard vaccines work
and now you’re immune
to any other vaccine
information
1:48 PM · Apr 8, 2025