Entry in progress—B.P.
 
“A guy walks into a bar…” is a typical form of what has been called the “bar joke.” However, during the 2019–20 coronavirus pandemic, most bars were closed.
 
“A man doesn’t walk into a bar…,” “A man doesn’t walk into a pub…,” “An Englishman, an Irishman and a Scotsman don’t walk into a bar” and “An Englishman, an Irishman and a Scotsman walk into a bar. Those were the days” are related jokes.
     
   
Wikipedia: 2019-20 coronavirus outbreak
The 2019–20 coronavirus pandemic is an ongoing global pandemic of coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The outbreak was first identified in Wuhan, Hubei, China, in December 2019, and was recognised as a pandemic by the World Health Organization (WHO) on 11 March 2020.
   
Twitter
Paulie
@skiologist
A virologist, an epidemiologist and a scientist walk into a bar,
of course they didn’t.
3:32 AM · Jul 3, 2020·Twitter for iPhone
 
Facebook
Scott Perkins
July 7, 2020 · Shared with Public
An epidemiologist, an ICU doctor and a scientist all walk into a bar.
I’m just kidding, they know better.
 
Twitter
Andy (A2002980) #FETCHFAM
@DrVxD
So, a virologist, and epidemiologist and a doctor walked into a bar.
Of course they didn’t.
1:45 PM · Jul 7, 2020 from Poplar, London·Twitter for Android
 
Twitter
Jack Rackem
@JackRackem
Sorry if this is recycled, but a colleague just sent it:  An epidemiologist, an ICU doctor and a scientist all walk into a bar. Just kidding, they know better.
3:36 PM · Jul 7, 2020·Twitter for iPhone