Thread by @PrognosticChats

Here are the studies🧵Covid can cause;
Cognitive impairment, brain shrinkage, heart attacks, strokes, kidney damage, lung damage, diabetes, clots & other blood disorders, immunological & neurological disorders.
It is multisystem, acute & potentially chronic (1 in 10 infections)🧵

Covid infection can cause cognitive impairment & reduction in brain size.
Study: “A greater reduction in global brain size in the Covid positive cases. Those who were infected with Covid also showed on average a greater cognitive decline”
nature.com/articles/s4158…

Cognitive decline (memory impairment and reduced executive function) in those who had Covid.
The Lancet Healthy Longevity;
thelancet.com/journals/lanhl…

Covid can lead to heart attacks & strokes. Risk remains elevated for one year after an infection. Study: nature.com/articles/s4416…

Covid & Kidney damage
Study: “People with long-term COVID experienced substantial decline in eGFR (kidney function) within one year from the infection date”
academic.oup.com/ndt/article-ab…

Covid reinfection multisystem risks study: “Those people who were reinfected with Covid had:
X3.5 risk lung & kidney damage
X3 risk heart & blood disorders
X2 risk mental health disorders & new diabetes
X1.6 risk neurological disorders”
nature.com/articles/s4159…

reinfection also contributed to additional risks of;

death (risk x2.17)
and
hospitalisation (x3.32)
nature.com/articles/s4159…

Covid was the 3rd leading cause of death in Australia last year. Sadly Covid deaths continue. Despite undercounting from reduced surveillance & testing, it is still a leading cause of death globally.
bmj.com/content/381/bm…

You can get Long Covid/ Post-Covid Syndrome after your 1st, 2nd, 3rd, 4th, 5th infections. Every time you are infected you run the risk of post Covid Syndrome with a variety of potential complications.

🧵 on Long Covid / Post-Covid Syndrome

https://twitter.com/PrognosticChats/status/1740472264007778437

Covid causes impairment in mitochondrial function & skeletal muscle function with immune cell & amyloid deposits leading to severe exercise induced myopathy in LC
nature.com/articles/s4146…

Covid can interfere with your heart rate control, leading to palpitations, fainting, chest pain & a host of other symptoms, all through autonomic nervous system dysregulation. See BMJ Paper: Orthostatic tachycardia after covid-19
bmj.com/content/380/bm…

Covid causes 50% increased risk of New Onset Dementia in those aged >60, evident at 12 months post infection
X18 times increased risk with severe Covid infection
X2 times as much Cognitive Impairment with any infection (compared to those with no infection) - paper in linked tweet

https://twitter.com/PrognosticChats/status/1755683834513817776

p53 is a tumour suppressor-it helps stop cancer.
Covid proven to suppress p53 for
🚨16 weeks after mild/moderate infection
🚨At least 24 weeks after severe infection
journalofinfection.com/article/S0163-…

Covid causes brain damage; impaired memory & cognition, with falling IQ with each infection. The damage done is still evident 1 year after the infection (maybe longer - we are finding out as we go along now).
Proven brain damage.
The study; nejm.org/doi/full/10.10…

Covid (live virus) has been found in bone (skull) at autopsy, “suggesting that live virus is present in tissues postmortem, including bone” - this is not; mild, a cold, insignificant.
wwwnc.cdc.gov/eid/article/30…

Children’s cardiac risks 💔 post-acute Covid, children & adolescents are at statistically significant increased risk of hypertension, ventricular arrhythmias, myocarditis, heart failure, cardiomyopathy, cardiac arrest, clots, chest pain, & palpitations
medrxiv.org/content/10.110…

Children’s cognitive impairment due to covid infections 🚨

“Clinicians should be aware of cognitive impairment post-infection and its co-occurring nature with poorer sleep, behavioural and mental health symptoms.” July 2024 pubmed.ncbi.nlm.nih.gov/38735404/

More evidence on Covid leading to Diabetes here in The Lancet (Aug 2024)
thelancet.com/journals/landi…

Covid during pregnancy 🤰
- higher risk of severe illness
- higher risk of ICU
- x2 risk of still birth
- x2 risk of premature delivery
- higher risk of emergency caesarean
- higher risk of preeclampsia
rcog.org.uk/guidance/coron…

Covid can damage your liver: “Liver injuries have been documented in patients affected by COVID & commonly have mild increasing liver enzymes range from 14%-53%. Those with severe disease (hospitalised) have shown a higher increase in transaminase enzymes”
ncbi.nlm.nih.gov/pmc/articles/P…

Covid causes vascular inflammation in your brain & brain covering (meninges) that’s persists long after the acute infection. It’s not “mild”.

https://twitter.com/erturklab/status/1862524693640564871

“new-onset AF (Atrial Fibrillation) represents a frequent complication in COVID-19
pmc.ncbi.nlm.nih.gov/articles/PMC98…

This study shows you have an elevated risk of heart attacks, strokes & death for 3 years after a Covid infection. This longterm risk increase from an infection is unique to Covid.

What happens with multiple infections? I think you know.

Study: ahajournals.org/doi/10.1161/AT…

2025 Study shows Covid causes PERSISTENT brain damage:
“These findings indicate that even mild COVID can result in persistent neurocognitive deficits, structural brain alterations & functional abnormalities, both in individuals with & without brain fog”
sciencedirect.com/science/articl…

We have known for some time that Covid causes brain damage. This Dec 2024 study adds to the info showing brainstem damage, you can’t function properly with a broken brainstem, ask most people with LC what happens to their heart rate when they stand up. academic.oup.com/brain/article/…

Covid is proven to cause damage to your blood vessels right down to the smallest ones (your capillaries). That’s why it has potential to harm every organ (as they all have blood supplies & are dependent on them).
Study from April 2025 rmdopen.bmj.com/content/11/2/e…

Covid causes vascular inflammation and microclots, a process minimised as “Covid toes” is actually clots & vascular
damage in your smallest blood vessels

https://twitter.com/PrognosticChats/status/1966909917706772533

Covid can damage your pancreas giving you insulin dependent diabetes
It can also damage your thyroid, making you dependent on medication for life (to live)

https://twitter.com/dlingenfelter/status/1965421796217553105

I know heart attacks, strokes, sudden death, dementia, cognitive impairment, autonomic failure (heart rate/breathing/gut issues), Parkinson’s, diabetes, thyroid failure, clots, autoimmune conditions, kidney, liver & lung damage didn’t get your attention…

So how about this?

https://twitter.com/ejustin46/status/1752157147683537291

More evidence on how Covid can damage your kidneys, cause chronic kidney issues & how those with kidney disease face a greater risk of severe illness & death with Covid infections…

https://twitter.com/PrognosticChats/status/1966970493858467859

More evidence on Covid causing “significant volume reductions” of your brain matter including cerebellum & brain stem, causing autonomic dysfunction, impaired motion & proprioception & disturbance of sleep cycles
medrxiv.org/content/10.110…

The more infections your child gets, the more risk of organ damage (aka long Covid). Confirmed in The Lancet oct 2025:

https://x.com/prognosticchats/status/1973414892884390026?s=46

x.com/prognosticchat… x.com/prognosticchat…