This week's Test & Trace report is out, showing the impact of the 16,000 test results that were mislaid in the last week of September.
As if that wasn't bad enough, a HUGE number of tests hadn't given a result by the end of the week, and last week's backlog has been abandoned.
The number of people testing positive continues to rise sharply, but the number of cases referred to Test & Trace didn't.
There's a shortfall of 16,981 cases - far more than usual.
Only two thirds of people who tested positive that week were referred to Test & Trace!
This seems to be largely due to 16,000 cases that were missed because the old version of Excel that PHE use to import data from Pillar 2 labs ran out of rows!
The extra cases were finally referred to T&T last weekend and should be in next week's report.
A record breaking 95,700 tests hadn't delivered a result when the report was compiled.
10% of all tests done in England that week!
Including 59,000 "Satellite" tests, mostly from care home staff and vulnerable residents now left waiting for results!
I don't think that includes the 16,000 tests that fell off the spreadsheet, as those DID deliver results, they just weren't counted on the PHE dashboard or referred to contact tracers.
But even if it does, this would still be by far the worst week to date.
That's how bad it is.
And this is despite labs seeming to have given up on the (relatively small) backlog of tests from the previous week.
Only 1,895 of 18,855 tests listed as not completed in last week's report have now given a result.
Again most of the abandoned (void?) tests came from care homes.
The average time taken to deliver Home and Satellite tests seems to be improving since peaking a month ago.
But that doesn't include tens of thousands of people who got no result at all yet.
And in person tests (at drive in, walk up and mobile test sites) are getting slower.
We also now have data on how far people travelled to take their test.
This shows average distances falling since the crisis in early September, when testing was rationed as labs ran out of capacity.
But it ignores people who couldn't book a test within a reasonable distance.
Meanwhile as lab capacity finally rises, the number of tests being made available at Regional (drive in) sites is starting to recover as rationing is eased.
But it's still far below the level we saw throughout August.
If you're still having trouble booking a test, this is why.
For the 34,494 people who DID manage to book a test, got a result back from it, and were actually referred to contact tracers without dropping off the bottom of a spreadsheet, the news doesn't get much better.
Only 74% of them were reached, below the 80% target.
The biggest failing though is still in reaching contacts.
The outsourced call centre service handling "non-complex" cases only reached 62% of contacts they identified.
Even including "complex" cases handled by local health officials it's only 69%.
Again, the target is 80%.
All these failures add up.
90% of people tested got a result
67% of cases were referred to contact tracers
74% of those cases were reached
69% of their contacts were reached
So as a ball park figure, about 90% * 67% * 74% * 69% = only 31% of possible contacts reached in time!
This week's Test & Trace report and accompanying data can be found here.
Some people still seem convinced the recent surge in covid-19 cases is caused by "false positives" (people who don't have the virus but still test positive due to various issues), often claiming 90% of reported cases aren't real.
This argument doesn't hold water.
Here's why...
A lot of this goes back to a quote from Matt Hancock that the false positive rate was "under 1%".
Some assumed the rate was close to 1%, which would mean if you test 200,000 people a day who (mostly) don't have the virus, you'd get 2,000 false positives.
As I pointed out last month, the government utterly failed to increase lab capacity over the summer, despite rising demand (much of it driven by their own policies).
Pillar 1 capacity has barely changed since July 7.
Pillar 2 capacity stalled on June 14!
As Lighthouse Labs handling Pillar 2 (community) testing hit capacity in late August, the government started paying private labs (most in the EU) to handle excess tests.
This accounted for ALL of the increase in Pillar 2 capacity over the next two weeks.
PHE seems to have changed the way it calculates positivity rates, 4 weeks after I pointed out they appeared to be using the same incomplete count of the number of people tested that's given in the Test & Trace report.
This massively and increasingly overstated positivity rates.
Satellite centre tests (mostly repeat testing of care home staff and residents who have been tested before, and therefore don't count as new people tested) now make up almost half of all Pillar 2 tests.
You can see the impact this has by comparing tests done to "people tested" -
Another interesting story from inside the testing system in @thesundaytimes today, this time reporting on issues at Randox, who seem to provide a quarter of current Pillar 2 capacity.
Tests are often delayed or voided, with other contracts taking priority over national testing!
The government failed to increase lab capacity AT ALL over the summer, despite their own policies leading to increased demand for tests that reduced the headroom available to deal with any second wave.
Now that cases are surging the system is collapsing.
This was all avoidable.
So what went wrong?
Pillar 2 capacity hit 135,000 tests a day on June 14.
But demand started rising from the start of July.
And capacity didn't go up again until August 27.
By then labs had been running near 100% capacity for a week, leading to widespread delays and backlogs.
This first became apparent in the Test & Trace reports, which showed longer and longer delays in delivering results for home and satellite site (mostly care home) tests, and over 10,000 tests a week never delivering a result at all!