Dr Duncan Robertson Profile picture
Jun 17, 2021 36 tweets 9 min read Read on X
PHE have issued their latest surveillance report.

"Case rates increased in all age groups, ethnic groups and regions. Overall Pillar 1 and Pillar 2 positivity increased compared to the previous week, most notably in younger age groups."

A thread
assets.publishing.service.gov.uk/government/upl…
"This week, data on SARS-CoV-2 reinfections in England are being reported for the first time. 15,893 possible reinfections have been identified, of which 53 have been confirmed by identification of genetically distinct specimens from each illness episode."
"COVID-19 hospitalisations increased slightly in week 23. Deaths with COVID-19 decreased in week 23."

(hospitalizations follow cases, deaths follow hospitalizations. This data is for the period ended 13 June.
"COVID-19 vaccine coverage was 56.1% for dose 1 at the end of week 23, reaching over 90% in all cohorts over the age of 65 years and over 80% in all cohorts over 50 years. COVID-19 vaccine coverage was 40.9% for dose 2 at the end of week 23."
"The impact of the vaccination programme is particularly notable in the seroprevalence data which indicates that approximately 79.1% of blood donors aged 17 and over have antibodies to SARS-CoV-2 from either infection or vaccination, ...
" ... compared to 14.8% from infection alone. High levels of seropositivity for vaccination or infection continue to be observed in those aged over 50, as well as increases in those aged 40 to 49 and 30 to 39, following vaccination rollout."
Cases and positivity increasing.
Change in age distribution (a) across the pandemic compared to (b) last two weeks (presumably the vaccine effect)
Case rates increasing particularly in 20-29, 10-19 year olds.
Interesting difference between 20-29 year old men vs women (Pillar 2 tests) - cases rising more in men vs women in this age group.
North-West region showing higer case rates (presumably outbreaks centred around Bolton/Blackburn with Darwen)
Case rates map. Note scale. Cornwall showing an increased rate.
New section on reinfection (defined as "tested positive for SARS-CoV-2 through PCR and/or lateral flow testing with an interval of at least 90 days between two consecutive positive tests")
"15,893 possible reinfections have been identified, of which 53 have been confirmed by identification of genetically distinct specimens from each illness episode."
"It is important to consider reinfections in the context of first infections and there is a 90-day delay before people with a first infection can become eligible for reinfection."
Possible reinfections in blue.
Possible reinfection rate by sex and age.
Incidents
And data caveats
"44 incidents were from care homes where 36 had at least one linked case that tested positive for SARS-CoV-2 where test results were available"

(This is one to be aware of - care homes were mentioned in SAGE minutes)
Food outlet / restaurants increases
Distribution around the country
Hospitalizations increasing (from a low base)
Excess deaths not detected.
Nearly 80% of blood donors have detectable antibodies / seroprevalence. Can see in the divergence in the lines that the vast majority of this comes from vaccination.
Antibodies/seroprevalence - very high (but *appears* to be on a slight downward trajectory but with large error bars so not certain) for over 50s.
Can also see the vaccine effect in 40-49 year olds and 30-39 year olds (but not 17-29 year olds) but still some way to go in 30-39 year olds.
Vaccination. 56% have had 1 dose, 41% have had 2 doses.

Not all who have had their first dose when eligible have had their second dose.
First dose takeup
Second dose takeup (can see that this has been the recent focus of vaccinations)
Vaccine dose 1 takeup by age
Vaccine second dose takeup by age
Vaccine takeup by ethnicity.

**There are still large disparities here**
I will post my heatmaps shortly.
Here are the heatmaps for cases, positivity, hospital and ICU admissions.

Here are the cases and hospitalization charts for today.

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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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