“There’s now an avian strain of coronavirus. One flu over the cuckoo’s nest”

A Covid-19 (coronavirus) joke was posted on Sickipedia on May 20, 2021:
   
“There’s now an avian strain of coronavirus. One flu over the cuckoo’s nest.”
 
   
Wikipedia: COVID-19 pandemic
The COVID-19 pandemic, also known as the coronavirus pandemic, is an ongoing pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), first identified in December 2019 in Wuhan, China. The outbreak was declared a Public Health Emergency of International Concern in January 2020 and a pandemic in March 2020.
   
Wikipedia: One Flew Over the Cuckoo’s Nest (film)
One Flew Over the Cuckoo’s Nest is a 1975 American drama film directed by Miloš Forman, based on the 1962 novel of the same name by Ken Kesey.
       
Sickipedia
There’s now an avian strain of coronavirus.
One flu over the cuckoo’s nest.
Joke by Chum in Other - Stupid · May 20, 2021 11:27 AM
 
Twitter
Jeevan
@Jeevan97121464
There’s now an avian strain of coronavirus.
One flu over the cuckoo’s nest.
8:41 AM · May 20, 2021·Twitter for Android (Posted after the above.—ed.)
 
Twitter
Three girls.
@DocandGemma
There’s now an avian strain of coronavirus.
One flu over the cuckoo’s nest.
1:45 PM · May 20, 2021·Twitter for iPhone
     
Facebook
VD Palombo
May 20, 2021 at 4:40 PM·
There’s now an avian strain of coronavirus.
One flu over the cuckoo’s nest.
 
Twitter
Woody
@DavidJEWood
There’s now an avian strain of coronavirus.
One flu over the cuckoo’s nest.
5:00 PM · May 20, 2021·TweetDeck
 
Twitter
Bob Kostic
@causticbob
There’s now an avian strain of coronavirus.
One flu over the cuckoo’s nest.
6:48 PM · May 20, 2021·Twitter Web App