My thoughts on the govt announcement yesterday regarding a new viral strain potentially driving an increase in cases in London. The claim, at least from listening to the daily briefing seems to be based on the strain increasing in frequency more recently. 1/N
https://t.co/SziLXNPM8Z
More from Deepti Gurdasani
First, there is strong evidence to support increased transmissibility of B117 - current estimates of increased transmissibility range between 30-70% - from epidemiological evidence examining the differential rate of growth of B117 with respect to other variants & increase in R
There is also evidence from PHE contact studies that the risk of transmission from those carrying the B117 variant is ~50% greater than with other non-B117 variants.
Increased transmissibility, even if a variant has the same fatality rate can increase deaths substantially, because the rate of growth of cases is higher- & more cases means more deaths.
Increased fatality rates also increase deaths- but do so
How dangerous are the B.1.1.7 and 501Y.V2 hyper-transmissible strains?
— Eric Topol (@EricTopol) January 11, 2021
by @AdamJKucharski @CFR_orghttps://t.co/aycWMN3b5h
h/t @Karl_Lauterbach pic.twitter.com/JlaFzzP06t
So how was risk of death with the variant studied?
We don't routinely sequence all samples for the virus. We've found that the variant has a particular deletion which means that some PCR tests on samples with the variant give a different read-out when the variant is present.
I've heard a lot of scientists claim these three - including most recently the chief advisor to the CDC, where the claim that most transmission doesn't happen within the walls of schools. There is strong evidence to rebut this claim. Let's look at
The science shows us that most disease transmission does not happen in the walls of the school, but it comes in from the community. So, CDC is advocating to get our K-5 students back in school at least in a hybrid mode with universal mask wearing and 6 ft of distancing. https://t.co/dfvJ2nl2s4
— Rochelle Walensky, MD, MPH (@CDCDirector) February 14, 2021
Let's look at the trends of infection in different age groups in England first- as reported by the ONS. Being a random survey of infection in the community, this doesn't suffer from the biases of symptom-based testing, particularly important in children who are often asymptomatic
A few things to note:
1. The infection rates among primary & secondary school children closely follow school openings, closures & levels of attendance. E.g. We see a dip in infections following Oct half-term, followed by a rise after school reopening.

We see steep drops in both primary & secondary school groups after end of term (18th December), but these drops plateau out in primary school children, where attendance has been >20% after re-opening in January (by contrast with 2ndary schools where this is ~5%).
Questions have to be asked about the evidence Jenny Harries gave to the Education Committee today about the risk to teachers.
— Adam Hamdy (@adamhamdy) January 19, 2021
Was she aware of this data?
If not, why wasn\u2019t she properly briefed?#COVID19 #schools https://t.co/4wa1PyAJld pic.twitter.com/eqFjaA1zYC
data shows *both* primary & secondary school teachers are at double the risk of confirmed infection relative to comparable positivity in the general population. ONS household infection data also clearly show that children are important sources of transmission.
Yet, in the parliamentary select meeting today, witnesses like Jenny Harries repeated the same claims- that have been debunked by the ONS data, and the data released by the @educationgovuk today. How many lives have been lost to these lies? How many more people have long COVID?
has repeatedly pointed out errors & gaps in the ONS reporting of evidence around risk of infection among teachers- and it's taken *months* to get clarity on this. The released data are a result of months of campaigning by her, the @NEU and others.
Rather than being transparent about the risk of transmission in school settings & mitigating this, the govt (& many of its advisors) has engaged in dismissing & denying evidence that's been clear for a while. Evidence from the govt's own surveys. And global evidence.
Why?
More from Government
A thread.

The Government's strategy at the beginning of the pandemic was to 'cocoon' the vulnerable (e.g. those in care homes). This was a 'herd immunity' strategy. This interview is from
Government #coronavirus science advisor Dr David Halpern tells me of plans to \u2018cocoon\u2019 vulnerable groups. pic.twitter.com/dhECJNbmnI
— Mark Easton (@BBCMarkEaston) March 11, 2020
This strategy failed. It is impossible to 'cocoon' the vulnerable, as Covid is passed from younger people to older, more vulnerable people.
We can see this playing out through heatmaps. e.g. these heatmaps from the second
Here are the heatmaps for Covid detected cases, positivity, hospitalizations, and ICU admissions. This is for the week to 3 January 2021.
— Dr Duncan Robertson (@Dr_D_Robertson) January 7, 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. pic.twitter.com/SEEVgUVK4j
The Government then decided to change its strategy to 'preventing a second wave that overwhelms the NHS'. This was announced on 8 June in Parliament.
This is not the same as 'preventing a second wave'.
https://t.co/DPWiJbCKRm

The Academy of Medical Scientists published a report on 14 July 'Preparing for a Challenging Winter' commissioned by the Chief Scientific Adviser that set out what needed to be done in order to prevent a catastrophe over the winter
One thing civil servants learn is to write things down. Here is @acadmedsci's 14 July report commissioned by @uksciencechief. For the record.
— Dr Duncan Robertson (@Dr_D_Robertson) September 17, 2020
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If everyone was holding bitcoin on the old x86 in their parents basement, we would be finding a price bottom. The problem is the risk is all pooled at a few brokerages and a network of rotten exchanges with counter party risk that makes AIG circa 2008 look like a good credit.
— Greg Wester (@gwestr) November 25, 2018
The benign product is sovereign programmable money, which is historically a niche interest of folks with a relatively clustered set of beliefs about the state, the literary merit of Snow Crash, and the utility of gold to the modern economy.
This product has narrow appeal and, accordingly, is worth about as much as everything else on a 486 sitting in someone's basement is worth.
The other product is investment scams, which have approximately the best product market fit of anything produced by humans. In no age, in no country, in no city, at no level of sophistication do people consistently say "Actually I would prefer not to get money for nothing."
This product needs the exchanges like they need oxygen, because the value of it is directly tied to having payment rails to move real currency into the ecosystem and some jurisdictional and regulatory legerdemain to stay one step ahead of the banhammer.
He's STILL in charge of the Mueller investigation.
He's STILL refusing to hand over the McCabe memos.
He's STILL holding up the declassification of the #SpyGate documents & their release to the public.
I love a good cover story.......
The guy had a face-to-face with El Grande Trumpo himself on Air Force One just 2 days ago. Inside just about the most secure SCIF in the world.
And Trump came out of AF1 and gave ol' Rod a big thumbs up!
And so we're right back to 'that dirty rat Rosenstein!' 2 days later.
At this point it's clear some members of Congress are either in on this and helping the cover story or they haven't got a clue and are out in the cold.
Note the conflicting stories about 'Rosenstein cancelled meeting with Congress on Oct 11!"
First, rumors surfaced of a scheduled meeting on Oct. 11 between Rosenstein & members of Congress, and Rosenstein just cancelled it.
Rep. Andy Biggs and Rep. Matt Gaetz say DAG Rod Rosenstein cancelled an Oct. 11 appearance before the judiciary and oversight committees. They are now calling for a subpoena. pic.twitter.com/TknVHKjXtd
— Ivan Pentchoukov \U0001f1fa\U0001f1f8 (@IvanPentchoukov) October 10, 2018