Cat in the Hat 🐈‍⬛ 🎩 🇬🇧 Profile picture
Mar 16 23 tweets 11 min read Read on X
In honour of #LongCOVIDAwarenessDay, I’d like to present some important data from the latest GP-Patient survey.

This is a HUGE survey with a sample size of ~700K people in England (5x bigger than ONS’s Covid survey).

In this thread, I’ll walk you through some key findings…

/1 Image
According to the GP-Patient survey:

🚨4.2% of people say they DO have Long Covid. That equates to around 2.3M people in England.

🚨A further 9.5% (~5.3M) say they ‘don’t know’.

So potentially as many as 7.6M people in England either have Long Covid or suspect they might.

/2 Image
The fact that 9.5% of people said they “don’t know” if they have long Covid is actually not surprising.

It’s a HUGE number of people who suspect something isn’t right but don’t have clarity…

…and once you think about how Covid is diagnosed, it makes perfect sense.

/3
For starters, hardly anyone tests for Covid anymore.

Free mass testing ended on 1 April 2022.

Since then, if someone gets Covid symptoms, it’s unlikely they’ll test & will never know for sure if it was actually Covid.

That makes linking later symptoms to Covid much harder.

/4 Image
Secondly, it’s well documented that Long Covid patients are often dismissed & gaslit by doctors.

All too often, physical symptoms are dismissed as “stress, anxiety or poor mental health”.

This is such a widespread issue that the WHO put out the post below just this week.

/5 Image
Another complication with diagnosis is that some Covid damage may be invisible at first.

Studies show that Covid can affect organs including the heart, brain & kidneys…

…but you may not notice anything immediately…

…until problems appear months or even years later.

/6 Image
Many of the conditions linked to Covid are long-term diseases:

🫀 cardiovascular disease
🧠 neurological conditions
🚨metabolic conditions (eg. diabetes)

Some of these can develop slowly after infection… and wouldn’t necessarily be attributed to a past Covid infection.

/7 Image
At an individual level, it can be hard to prove that something like heart attack is linked to a past Covid infection.

But large-scale studies show that the cumulative risk of developing long-term health conditions increases with each Covid infection.



/8 nature.com/articles/s4159…Image
And we can see this coming through loud & clear in the GP-Patient survey data too!

This chart shows prevalence of long-term health conditions in England.

It was pretty stable at ~52% up to 2021.

But then all Covid mitigations were axed…

…and look 👀 what happened next.

/9 Image
Seriously. Just stop for a moment and take a proper look at that chart.

The trend couldn’t be clearer.

Prevalence of long-term health conditions has increased by a staggering 20% since 2019.

That should be ringing some serious alarm bells with the government.

/10 Image
Now let’s dig a little deeper into the GP-Patient survey and look at which *specific* long-term health conditions have seen the biggest increases.

It’s a lot of the conditions that are known to be triggered & exacerbated by Covid…

/11 Image
Take a look at the rises for these conditions:

▪️high blood pressure
▪️mental health
▪️diabetes
▪️heart/vascular condition
▪️neurological condition
▪️kidney/liver disease
▪️stroke
▪️other long-term condition (which would include long Covid)

/12 Image
The sharp upward trend in prevalence of long-term health conditions is rather reminiscent of another chart…

This chart shows the number of working age adults in the UK who have now been forced to drop out of the workplace due to long-term sickness.

/13 Image
And it’s not just happening here in the UK.

The chart below shows UK data 🇬🇧 (working age adults who are out of work due to long-term sickness)…

…alongside US data 🇺🇸 (adults reporting a disability).

Two countries. Two charts.

A very similar (and concerning) trend.

/14 Image
Here’s @jim_reed, the BBC’s health reporter, speaking on BBC Radio 5 Live:

“Almost every expert out there thinks <Long COVID> is a very important factor in explaining why we’ve seen this rise over the past 4-5 years in people who are off work long-term sick”.

/15
And other studies demonstrate this clearly too…

National data from both the UK (ONS) & US (CDC) suggests that roughly 1 in 5 of those affected by Long Covid will be SEVERELY debilitated, with their ability to undertake basic day-to-day activities limited a LOT.

/16 Image
And, in Dec 2023, the UK LOCOMOTION study published an important paper warning that:

🚨28% of Long Covid patients in their study had been forced to stop working altogether 🟠⚪️

🚨A further 23.5% of LC patients had reduced their paid work hours 🔵



/17 evidence.nihr.ac.uk/alert/how-muchImage
In April 2024, an Economist Impact report warned that:

🚨251.8 MILLION work hours may be lost in the UK in 2024 due to Long Covid.

🚨The economic cost was estimated to be over US$15.5 BILLION, equivalent to 0.5% of the UK’s GDP.



/18 impact.economist.com/health-society…Image
Scientists around the world warned repeatedly that Long Covid would be a ‘mass disabling event’.

Tragically, it seems we are now watching that unfold in real time.

The consequences of not taking this seriously will be enormous, for both the health & economy of our nation.

/19 Image
The best time to have done something about this was 6 years ago…

…but the next best time is NOW!

And it’s important to remember:

PREVENTION IS BETTER THAN CURE
(especially when there is no cure).

Masks, ventilation & air filtration are key.

nature.com/articles/s4159…

/20 x.com/zalaly/status/…Image
Final note: The charts of the GP-Patient survey data in this thread were created by me. They are not official charts from the survey report…

…and that’s because the data on prevalence of Long Covid (Q40) was curiously *left out* of the national report.

gp-patient.co.uk/latest-survey/…Image
Luckily, data from the Long Covid question (Q40) is still available in the raw data files which is how I’ve been able to create my chart.

However, these LC stats will have been seen by very few people unless they’ve been digging around in the raw data.

gp-patient.co.uk/FileDownload/D…Image
It’s also worth noting that the Long Covid question *was* included in the National reports in previous years…

…so, somewhere along the line, an intentional decision was made to REMOVE it for the 2025 report.

Why? 🤔

gp-patient.co.uk/past-survey-re…Image

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More from @_CatintheHat

Mar 14
CATA's reports are a truly remarkable piece of forensic investigation & took literally YEARS to put together.

The fact it’s taken so long is a fundamental part of the story.

For example: it took a whopping 27 MONTHS to extricate one document from the DHSC via an Fol request... Image
And it took 17 MONTHS to elicit a set of draft minutes from IPC Cell meetings which took place in Dec 2020 - and only following a direct order by the ICO.

This doc is one of the most damning pieces of evidence in the report as it reveals how minutes were fundamentally altered. Image
PHE & UKHSA have been similarly obstructive in providing information in a timely fashion.

The statutory requirement of FoIs is to provide the info requested within 20 working days…

…but it took over 300 WORKING DAYS (roughly 14 MONTHS) to finally extricate one key document. Image
Read 5 tweets
Mar 10
In 2023, the British Council for Offices (BCO) updated the ventilation guidance for offices:

💨 The *minimum* recommended ventilation rate was increased from 12 to 14 litres of outdoor air per sec per person.

Now guess what the ventilation rate is in a typical UK classroom…❓ Image
Since 2022, the Schools Air quality Monitoring for Health & Education (SAMHE) project has monitored indoor air quality in hundreds of schools across the UK.

Shockingly, their data revealed that the ventilation rate in a typical UK classroom is just 5.3 litres per sec per person. Image
Worse still, the data shows the average ventilation rate plummets to just 3.8 litres per sec per person in colder weather.

Now compare this to the MINIMUM recommended ventilation rate for offices of 14 litres per sec per person.

Schools are achieving just a fraction of this! Image
Read 18 tweets
Feb 22
FROM THE OLYMPICS TO NASA, WEARING MASKS IS BACK - EXCEPT IN HEALTHCARE

Brilliant article on how masking is increasingly popular with Olympic athletes, actors & astronauts wanting to avoid illness…

…but sadly, in hospitals, masking is rare & those who do are often gaslit.

🧵 Image
Here’s a link to the online version of this article by the brilliant Tess Finch Lees:
independent.ie/opinion/commen…
The link above is paywalled so here’s an archived link where you can read it for free:


(Please do also click the first link as well though to increase traffic & help persuade editors to publish more Covid stories like this).archive.ph/sfP52
Read 18 tweets
Feb 20
🏴󠁧󠁢󠁳󠁣󠁴󠁿 Something unusual & concerning in Scotland’s Covid data in the last few weeks.

There’s been a sharp rise in the proportion of hospitalised Covid cases which are children.

Currently over half of all Covid hospitalisations in Scotland are kids aged 0-14 years.

(h/t @gwladwr) Image
The data also shows that, since January, Covid incidence rates for these younger age groups have been going into the ‘high’ (dark blue) and ‘very high’ (purple) classifications, particularly the 1-4 years age group. Image
I’ve also taken a look at the England data and Covid positivity rates have been rising sharply in recent weeks in the 0-14 age groups.

Definitely one to watch in the coming weeks… Image
Read 4 tweets
Jan 30
🏴󠁧󠁢󠁥󠁮󠁧󠁿PUPIL ABSENCE - AUTUMN 2025

The DfE have now published pupil absence data for the Autumn term:

🔎 Pupil illness absence across the autumn term averaged out at 3.44% (compared to pre-pandemic average of 2.5%).

🔎 By the end of Nov, illness absence had soared to 4.7%.

🧵 Image
DfE commentary:

“The increases seen in the latter weeks of term were mainly driven by illness-related absence”

“This increase in absence is equivalent to approximately 500,000 less days in school compared to the previous autumn term.”

…e-education-statistics.service.gov.uk/find-statistic…Image
To anyone paying attention, these illness absence figures should not come as a surprise.

By early December, UKHSA was warning about how flu was spreading like wildfire through classrooms, leading to very high infection rates in school-age children (pink & green lines on chart). Image
Read 10 tweets
Jan 4
COVID & CHILD DEVELOPMENT

New US study showing impact on child brain development when their mothers are infected with COVID during pregnancy.

Results show:
🔎 Structural differences in regions of the brain
🔎Lower cognition & social-emotional scores

sciencedirect.com/science/articl… x.com/harryspoelstra…Image
And here’s another study, this time from Brazil (published Jun 2025), which also shows the impact of maternal COVID infection on child development.

At 24 months:
🔎 36% of infants exhibited cognitive delays
🔎 64% communication delays
🔎 57% motor delays

nature.com/articles/s4139…Image
And another study, just published this week (Jan 2026) in ‘Obstetrics & Gynecology’, came to similar conclusions…

“Maternal SARS-CoV-2 infection in pregnancy was associated with increased risk of adverse neurodevelopmental diagnoses by age 3 years”.

journals.lww.com/greenjournal/f… x.com/jama_current/s…Image
Read 4 tweets

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