Dr Duncan Robertson Profile picture
May 25, 2021 9 tweets 3 min read Read on X
The areas with extra guidance to avoid non-essential travel doesn't make a lot of sense.

A short thread.
Let's look at the list published on Friday.

Here are the areas which have new guidance to avoid non-essential travel to/from these areas.

gov.uk/guidance/covid…
Let's see where they are on the list of B.1.617.2 cases using the latest data from @sangerinstitute

For this, I am *only using the number of sequences in the latest week, week ending 15 May 2021*
covid19.sanger.ac.uk/lineages/raw
Here are the areas with the highest number of sequences in the latest week with data.

(Note that this is biased by surge testing)
So, the question is - why is Burnley on the list when other areas, say Preston isn't?

OK, it could be because some areas have higher populations that others. So let's look at the number of sequences per 100,000 people.
And let's look at North Tyneside, on the extra restrictions guidance list, with just 2 sequences that week
So - on the face of it, it doesn't look very fair.

There may be good reasons why these local authorities are still on the list, and there are caveats in the data covid19.sanger.ac.uk/lineages/raw
So the question is - if guidance was needed for the local authorities to avoid travel to/from these areas, and there are *other* local authorities with significantly higher number of B.1.617.2 cases - why are *those* local authorites not on the list?
The reason may be that there are outbreaks or particular epidemiological reasons in the listed areas.

But it may also be that B.1.617.2 is now so widely dispersed across the country that such guidance would be (relatively) futile.

So the question is - what's the plan now?

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More from @Dr_D_Robertson

Jul 18, 2024
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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