Alistair Haimes Profile picture
Sep 25, 2020 15 tweets 10 min read Read on X
Weekly round up of useful / reliable English covid statistics:

1. Cases
2. Care home outbreaks
3. Hospital deaths / admissions
4. Covid triage
5. Prevalence
6. Contact tracing
7. The Vallance-tracker
8. Mortality
9. Miscellaneous

#ahcveng
1. Cases

1a. Pillars 1&2 - last couple of weeks & last month (current wave) & full curve. Bear in mind the left-hand side was heavily rationed for testing, the right-hand side far less so: the 'two waves' are not comparable.

Source: Gov dashboard coronavirus.data.gov.uk/cases?areaType…
1. Cases

1b. English pillar 1 (clinical need / NHS) and pillar 2 (community swab) cases and % positive. The left-hand side was heavily rationed for testing, the right-hand side *far* less so.

Source: PHE covid surveillance report
assets.publishing.service.gov.uk/government/upl…
2. Care home outbreaks

*Critical data*. In week 38 there were 134 acute respiratory incidents with at least 1 +ve covid test.

Source: weekly PHE report as above
3. Hospital deaths and admissions

Covid deaths from NHS England stats (2nd wave now visible): england.nhs.uk/statistics/sta…

Covid admissions (total & recent) & covid patients on ventilators (predictor of deaths): coronavirus.data.gov.uk/healthcare?are…
3b. An aside on admissions

Covid admissions are still growing at a linear, rather than exponential, rate. *This could change*.
4. Triage

111 covid triage should be an excellent lead indicator of hospital admissions, *particularly* for the aged 70+

Thrown off recently by school / college kids seeking tests, but now falling back. No sharp increase in the vulnerable 70+.

digital.nhs.uk/data-and-infor…
5. Incidence (ONS)

17 day doubling, faster in the young.

We want *more* contrast between incidence in the old versus young, current policy holds that back: the sooner it passes through the young, the sooner it passes over the elderly / vulnerable.

ons.gov.uk/peoplepopulati…
6. Contact tracing

Each isolation via contact tracing has cost £300k, and most of these are our own housemates and guests whom we could have told anyway.

7. The Vallance-tracker

At Monday's presser @uksciencechief and @CMO_England presented only one scenario for the progression of UK cases (by report date), to 50,000 per day by mid-Oct; so it seems right to hold them to account on this until any alternative is presented.
8. Mortality



This will be an interesting one to watch for the rest of the year, if covid has taken a lot of people who might otherwise not have survived Nov/Dec flu season.

Note 2014/15 and '19: a light mortality year creates "dry tinder".
9. Miscellaneous 1: Spain

Spanish case doubling rate (about 3 weeks?):


Incidence seems to be decreasing through Spain now: 2nd wave decelerating.

isciii.es/QueHacemos/Ser…
9. Miscellaneous 2:

*Very* interesting SAGE paper published regarding the practicalities of shielding the vulnerable as a tactic for minimising impact of covid epidemic. Well worth a read:

gov.uk/government/pub…
9. Miscellaneous 3:

On the same subject, an interesting snippet from another SAGE paper:

assets.publishing.service.gov.uk/government/upl…
Oops last month below

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More from @AlistairHaimes

Jan 8, 2021
This is Toby Young (@toadmeister)'s response to my piece in the @spectator, which he very fairly follows by a frontline account from an in-house senior doctor in London.

spectator.co.uk/article/lockdo…

I thought I'd respond briefly to the response: short thread 1/n
I am still a lockdown sceptic, and Toby sets out very well the principled objections to lockdown that I still believe too. 2/n
I still think the 1st lockdown went on too long, with harms likely to have outweighed the benefits. TikTok punting videos while people missed basic healthcare is revolting.

I don't think the 2nd lockdown was well justified: the arguments that convince me now didn't then. 3/n
Read 10 tweets
Oct 24, 2020
Weekly round up of useful / reliable English covid statistics:

1. Incidence
2. Care home outbreaks / admissions
3. Hospital / ICU admissions and deaths
4. Covid triage
5. Cases
6. Contact tracing
7. Mortality
8. ICU profile: ICNARC

#ahcveng
1. Incidence

ONS: Incidence now up to 35k per day, 0.9% overall; huge variance regionally and by age group, with young getting infected *much* faster than old (good news), and this is backed up by Zoe (KCL/CSS) data: ()

ons.gov.uk/peoplepopulati…
2. Care home outbreaks / admissions

Care home outbreaks flat; still 3% of outbreaks. But admissions from care homes rising (so size of each outbreak bigger?)

*If* our interventions work, why are admissions from care homes growing at the same pace as elsewhere? 🤔
Read 10 tweets
Oct 24, 2020
My experience of contact tracing.
---
My daughter was sent home from school to isolate Tuesday morning, following a positive test by her teacher (who had been isolating since Friday).

She rapidly developed (moderate) fever and kept falling asleep (fine now), so was tested /1
This was 2.30pm Tuesday.

Result came through 10pm Thursday; within half an hour we had phoned all contacts (piano teacher, school, houseguests, other direct contacts).

Contact tracers phoned us 17 hours later (Friday afternoon); we gave them all the same information. /2
I asked what the point of contacting people we had already contacted; they confessed "basically... not much".

Since then they have repeatedly been contacting us (in isolation) by phone and text to confirm our details, even though I've told them we're isolating. /3
Read 5 tweets
Oct 17, 2020
Weekly round up of useful / reliable English covid statistics:

1. Incidence
2. Care home outbreaks
3. Hospital / ICU admissions and deaths
4. Covid triage
5. Cases
6. Contact tracing
7. Mortality
8. Miscellaneous: nosocomial

#ahcveng
1. Incidence

ONS shows continued increase in incidence as the seasons change, driven by areas of the country subject to enhanced lockdown restrictions.

Great news: clear divergence between incidence in the vulnerable >70 versus younger age groups.

ons.gov.uk/peoplepopulati…
(Caution due on the NE/Yorks piece of that chart: doesn't tally with the Zoe incidence data, which otherwise generally ties in well with ONS).

Read 13 tweets
Oct 9, 2020
Weekly round up of useful / reliable English covid statistics:

1. Incidence
2. Care home outbreaks
3. Hospital / ICU admissions and deaths
4. Covid triage
5. Cases
6. Contact tracing
7. Mortality
8. Miscellaneous: ICU, France & Spain, GB Dec

#ahcveng
1a. Incidence

Zoe (KCL CSS) suggests incidence is slowing after a steep rise, whereas ONS and Imperial (REACT1) show sharp recent rise.

covid.joinzoe.com/data

ons.gov.uk/peoplepopulati…

imperial.ac.uk/media/imperial…
1b. Incidence

Note sharp age distinction in ONS / REACT1; if you favour the "GB Declaration" approach (see below) you would want the difference between young and old incidence and trajectory as great as possible

ons.gov.uk/peoplepopulati…
Read 14 tweets
Oct 2, 2020
Weekly round up of useful / reliable English covid statistics:

1. Incidence
2. Care home outbreaks
3. Hospital & ICU admissions and deaths
4. Covid triage
5. Cases
6. Contact tracing
7. The Vallance-tracker
8. Mortality
9. Miscellaneous

#ahcveng
1a. ONS incidence

The headline is that during the most recent week (18 to 24 September) there were around 8,400 new infections per day not including those living in institutional settings, *down* from 9,600 previous week.

Still not rising in the elderly

ons.gov.uk/peoplepopulati… ImageImageImage
1b. Other incidence

We also had the Imperial "REACT1" interim incidence report this week which also pointed to a slowdown, and the KCL Zoe app (tracking symptomatic cases) points in the same direction

imperial.ac.uk/media/imperial…

covid.joinzoe.com/data ImageImage
Read 18 tweets

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