“2019: Avoid negative people. 2020: Avoid positive people. 2021: Avoid people” is a saying that has been printed on many images. The joke was told during the Covid-19 (coronavirus) pandemic.
   
“2019 - Avoid Negative People 2020 - Avoid Positive People” was posted on Twitter by Rashmi on March 30, 2020. “2019 Avoid Negative People 2020 Avoid Positive People 2021 Avoid People” was posted on Twitter by saranghaeee on December 5, 2020.
   
     
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.
   
Twitter
Rashmi
@RashmiVanwani
2019 - Avoid Negative People
2020 - Avoid Positive People
#COVID2019india
#CornavirusOutbreak #StopTheSpread
#SoloSafe
2:07 AM · Mar 30, 2020·Twitter for Android
   
Twitter
Timmy Turner
@DanielDela7
2019: Avoid negative people
2020: Avoid positive people
4:53 PM · Mar 30, 2020·Twitter for Android
   
Twitter
dewi
@kucengsw4g
2019 : avoid negative people
2020 : avoid postitive people
1:55 AM · Mar 31, 2020·Twitter for Android
   
Twitter
NO DR@M@
@iam_Emma_nuel
2019 : avoid negative people
2020 : avoid positive people
This life ehn
6:28 AM · Mar 31, 2020 from Victoria Island, Nigeria·Twitter for Android
   
Twitter
saranghaeee
@aehanaasmile
.        2019
Avoid Negative People
        2020
Avoid Positive People
        2021
  Avoid People
11:54 PM · Dec 5, 2020·Twitter Web App
   
Twitter
L @ [Sleeping face] Y
@dire_wolf56
2019
Avoid Negative People
2020
Avoid Positive People
2021
Avoid People Slightly
#2021goals
4:12 AM · Dec 30, 2020·Twitter for Android
   
Twitter
Sire_adel
@Sir_Adele
2019-Avoid Negative people,
2020- Avoid positive people,
2021- Avoid People.
5:59 AM · Dec 31, 2020·Twitter for Android
   
Twitter
sniperinstinct
@strngrfrnd
2019: avoid negative people
2020: avoid positive people
2021: AVOID PEOPLE
7:03 AM · Dec 31, 2020·Twitter for iPhone
 
Twitter
Mr Foxnose
@asymmetricalpha
2019 Avoid negative people
2020 Avoid positive people
2021 Avoid people
2022 Avoid….    ???
9:26 AM · Aug 27, 2021·Twitter Web App
 
Twitter
Bob Kostic
@causticbob
2019 Avoid negative people
2020 Avoid positive people
2021 Avoid people
6:26 PM · Aug 27, 2021·Twitter Web App