Dr Duncan Robertson Profile picture
Jan 7, 2021 8 tweets 7 min read Read on X
Here are the heatmaps for Covid detected cases, positivity, hospitalizations, and ICU admissions. This is for the week to 3 January 2021.

I have marked a line on 21 September, when SAGE recommended a circuit breaker, so you can see how the situation has deteriorated since then. Image
Detected cases increasing significantly in all age groups (colour and monochrome version).

(The vertical line is 21 September when SAGE recommended a circuit breaker.) ImageImage
Positivity for males. Increasing in each age group.

(The vertical line is 21 September when SAGE recommended a circuit breaker.) Image
Positivity for females. Increasing in each age group.

(The vertical line is 21 September when SAGE recommended a circuit breaker.) Image
Hospitalizations increasing significantly for 45+ age groups

(The vertical line is 21 September when SAGE recommended a circuit breaker.) Image
ICU admissions increasing in 45-64, 65-74, and 75-84 age groups.

ICU admissions declining in over-85s.

(The vertical line is 21 September when SAGE recommended a circuit breaker.) Image
This is an absolutely dire situation.

Comparing the data on 21 September when SAGE recommended a circuit breaker (which was rejected by the Government) and the situation now is stark. Image

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More from @Dr_D_Robertson

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
Mar 20, 2023
Like it or not, this equation is ambiguous.

The thing about maths (and language for that matter) is you aim to express things elegantly, while being unabiguous.

Unless you're trying not to.
Read 4 tweets

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