Christophe VeltsosFeb 27
Another 🚨🧵 by Dr. @[email protected] on XTwitter: "Principal component analysis of cytokine signature in COVID-19 and Long COVID 🚨First-of-its-kind clusters explain the LC chaos. #Leonardi_effect [...] study analysed plasma cytokine..." Full 🧵 threadreaderapp.com/thread/20269...
Show threadMarc VeldhoenJan 8
In other words, in some parts of the world Influenza has hit harder this year, but this is not everywhere. There is, of course, nothing else at play as some still try to convince people of = #Leonardi_Effect
3/4
Show threadMarc VeldhoenDec 8
One disinformation spreader to another? The 2nd highlights cancer and the role of T and NK cells, which is correct (albeit more complex), AJ makes it about SARS-COV-2 and take ownership of what isn't his. #Leonardi_Effect is not understanding basic science, but pretending.
2/2
Show threadMarc VeldhoenDec 6

Involve the large inflammatory reactions.

We now have the #Leonardi_Effect : making nonsense science claims and purposely trying to harm science, people and society with it.

https://open.substack.com/pub/marcveldhoen/p/post-covid-19-immune-competence
3/3

Post-COVID-19 immune competence

A short reference for those facing arguments of immune damage, exhaustion, lymphopenia or immunodeficiency.

Marc’s Newsletter
Show threadMarc VeldhoenDec 6

Don't get taken by statistical differences in the pre and post cohorts. These are not the same people, difference are very small and unlikely clinically of interest: they are the result of small changes in very large groups.

Don't fall into the #Leonardi_Effect
8/8

Marc VeldhoenDec 4

Dysregulated IFN-γ, IL-6 and TNF-α after COVID-19 is suggestive of lowered innate immune responses to SARS-CoV-2 and MTB

A paper already abused due to the #Leonardi_Effect (not understanding the data and methods used)

https://www.sciencedirect.com/science/article/pii/S1472979225001131?s=08
1/10

Show threadMarc VeldhoenDec 1
All this seems physiological, the result of an infection. There are no SARS-CoV-2 specific claims, since no infection controls were used. Unformtunately, the "dysfunction" in the title will get the COVID-doomers making unjustified claims = #Leonardi_Effect
10/10
Show threadMarc VeldhoenNov 29

Abstract: using tetramers, the authors managed to find the presence of virus-specific T cells, in 40% of LC patients, showing some activation. They looked at TCR sequences. That is it, nothing else, no info on non-LC, etc.

So don´t make things up, that is #Leonardi_Effect
4/4

Show threadMarc VeldhoenOct 30
This behaviour, abusing science without knowledge to defend an ideology is also known as the #Leonardi_Effect or #LeonardiEffect. It is spreading medical disinformation, by ideology, ignoring all data and knowledge available, but constantly claiming "I told you so".
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Show threadDavid Joffe PhD FRACPNov 24, 2022
@White_Bite #Leonardi_Effect