Dr Duncan Robertson Profile picture
Oct 2, 2020 15 tweets 6 min read Read on X
The latest Covid surveillance report has been published by Public Health England. Here is my commentary. The main point is that Covid is now widely established, not only in the north and the midlands but also north London and for the first time in Cornwall Image
The data is for week 39 (between 21 September and 27 September. First, positivity. This is the number of positive cases divided by the number of tests. It's now around 7%. THIS MEANS THAT NOT ENOUGH TESTS ARE BEING PERFORMED (@WHO recommend this does not exceed 5%) Image
Age pyramid of cases in the last two weeks. Mostly capturing younger people. Image
This shows high prevalance across the country. Note London. Image
Note that the local restrictions do not cover all of these areas.

visual.parliament.uk/research/visua… Image
Still large numbers of Covid incidents/outbreaks in educational settings / workplaces. Fewer in care homes than last week (which is very good news) Image
Clusters/outbreaks in educational settings in this report (remember this data is over a week old):
12 nursery
82 primary school
96 secondary school
12 SEN schools
22 college/university Image
Admissions to hospital rapidly increasing. ICU/HDU admissions increasing but lagged (as expected) Image
Since last week, much more widely dispersed hospital admissions Image
Covid deaths in the 'second wave' scale with age, but are not just for the old - some 30-something-year-olds. Note a significant number die after 28 days from a test, which is the number reported at coronavirus.data.gov.uk Image
Commentary:
- Test availability is limited meaning that the number of cases reported is a *minimum*
- Test trace and isolate all not working well
- R remains above 1
I forgot to list the watchlist. It's got so long that it needs to be in a separate document. Here it is assets.publishing.service.gov.uk/government/upl…

Question - why is the Joint Biosecurity Centre logo no longer on the watchlist? ImageImage
And here's another thing. Last week, CONTAIN framework maps were published for local authorities (LSOAs) on the watchlist. They don't appear to be published anymore.

Please can you direct me to where I can find these @PHE_uk / @DHSCgovuk ?

Thanks
Here is the heatmap of cases per 100,000 in each age group:

* Highest rises in 10-19 year olds
* High relative rise in 60-69 year olds
* Decrease in under-10s.

Note these are *minimum* figures due to:
(a) capacity for tests being exceeded by demand
(b) data lag for latest week Image
These have now been published. Thanks.

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More from @Dr_D_Robertson

Jul 18
The UK Covid Public Inquiry has published its first Report, on Resilience and Preparedness. It is the most urgent report, as we are still ill-prepared for the next pandemic.

🧵
This is the first of many reports, each reviewing a specific area, including healthcare systems; test, trace, and isolate; and the economic response to the pandemic.

The Module 1 Report sets out nine significant flaws from the Covid-19 pandemic: Image
The Report suggests 10 recommendations: Image
Read 11 tweets
Jun 9, 2023
Data thread from today's @IndependentSage briefing including a discussion on sick pay, the topic of today's discussion. 🧵 Image
Cases and tests. Relatively low.
Caveat that the ONS Covid infection survey has been paused ImageImageImageImage
Hospital admissions. Trend not upward.
Caveat that testing has changed in hospital. ImageImageImageImage
Read 14 tweets
Apr 21, 2023
Covid data presentation for the @IndependentSage briefing on 21 April 2023 🧵 Image
Testing has changed from 1 April 2023, so it is difficult to compare before and after this date.
gov.uk/government/new…
The ONS survey has been 'paused', so we can look at the (less recent, less representative) data on PCR positivity

coronavirus.data.gov.uk/details/testin… ImageImage
Read 11 tweets
Apr 20, 2023
Alright. Another maths thread. And why it's non-trivial to ask exam questions.
🧵
OK. So the 'exam question' is:

"Inflation is currently 10%. If inflation halves, how much will a £1 pint of milk cost".

Sounds easy. It's not. It's ambiguous. It's not a good question. Unless it's designed to be a bad question. In which case it's a good question.
1. It talks about 'inflation'. But *what* inflation? At the moment, we have overall inflation at roughly 10% but inflation of food at roughly 20%. So is the overall inflation rate the same as the inflation rate for milk? It's not clear. Bad question.
Read 9 tweets
Mar 24, 2023
Data thread from today's @IndependentSage briefing. 🧵
First, the @ONS Covid Infection Survey is being paused, and @CovidGenomicsUK is being retired. This will have implications for data reliability and availability going forward.
Read 17 tweets
Mar 20, 2023
OK, I'm going to write a response to this maths problem, published in @DailyMailUK, that has caused a lot of comment, some thinking the answer is 1 and some thinking the answer is 9.

A thread. 🧵

dailymail.co.uk/news/article-1…
So, what answer is correct? Is it 1 or is it 9?

Many of us would go straight to the answer 1. That's because we know (or our children know, and have taught us), that there is a 'rule' for how you deal with the order of doing the calculation - do you do + first or ÷, for example?
Enter BIDMAS (or BODMAS).

"It stands for Brackets, Indices [or Order], Division, Multiplication, Addition and Subtraction."

That's the conventional order. Forget about indices [or order] for now - that's not important for this one.
bbc.co.uk/bitesize/topic…
Read 12 tweets

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