@EpiEllie @mlipsitch @vivek_murthy Thanks @EpiEllie for the ?

A number of issues:

1) Regulatory - FDA must remove unnecessary regulatory requirements

Most crucial: ~90% sensitivity against PCR in ASYmptomatics w/out allowing a Ct cutoff

By time asymptomatics are found w PCR, Ct is >30 & post-infectious

1/x
@EpiEllie @mlipsitch @vivek_murthy By requiring demonstrating sensitivity specifically in asymptomatics, FDA is confusing EUA application with showing physiology of the virus.

Many studies show asymptomatics have virus.

The tests care about virus, not symptoms. FDA is confusing this point.

2/x
@EpiEllie @mlipsitch @vivek_murthy Reason FDA confuses this is b/c they can ONLY see tests as clinical medical diagnostic devices

Not as public health screening tools

This means their metrics and what they are looking for are not congruent with their intended use in this case. Which is a major problem.

3/x
@EpiEllie @mlipsitch @vivek_murthy Another problem is need for prescription

We now have a completely confusing landscape where some #COVID19 tests are prescription and some are not.

This makes no sense. Particularly since one of the most technically challenging to use is the one authorized at-home OTC test.

4/x
@EpiEllie @mlipsitch @vivek_murthy Other major issues are need to allocate the financial resources both to help the companies scale capacity and to produce the tests.

If USG doesn't give grants now to help them scale, then they will charge much more $/test later to cover costs. More than initial build out.

5/x
@EpiEllie @mlipsitch @vivek_murthy Many states governors want to put these tests into use.

But simply cannot afford it. It's pennies for the federal government, but $100M is a lot for any state.

So this needs to be an effort of the federal government first and foremost. Even if championed by the states.

6/x
@EpiEllie @mlipsitch @vivek_murthy Funding piece is crucial, which is why I've spent a lot of time lobbying congress to get it into the bill.

Unfortunately I failed this time around.

They vaguely worded it and suggested the states could each come together to do this. That's BS, must be central scaling

7/x
@EpiEllie @mlipsitch @vivek_murthy Also many physicians/scientists just can't see obvious problems with slow and infrequent PCR vs rapid frequent testing.

Which we have demonstrated well is not a problem.

Some of those qualms are here:

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More from @michaelmina_lab

23 Dec
IMPORTANT:

Particularly for UK

There’s been a LOT of concern about UK rapid antigen test program.

But here, the very tweet supposed to be showing it is failing, it shows it’s working well!!

The only missed samples were all very LOW PCR RNA - EXACTLY as expected.

1/x
The rapid antigen tests caught all of the high viral load cases that were likely contagious and missed the low RNA level cases who were most likely beyond their contagious period.

This suggests the testing was simply too infrequent to catch the important cases.

2/x
At what point are we going to stop making the claim that these tests are too insensitive?

They are doing the job exactly as anticipated. Public health is not about diagnosing and isolating old COVID cases. It’s about identifying current contagious people.

3/3
Read 5 tweets
23 Dec
THREAD

ARGH. Google’s new effort shows PERILS of lab based PCR screening

Great they’re trying, BUT:

“Employees are guaranteed a [swab] within 3 days of requesting.. & results back within 2 days of lab receiving sample”

So... 6 DAYS!! from moment deciding a test is wanted

1/x
That the test is being performed weekly is great. Perhaps people can order ahead. Still, with shipping, it will most likely be 3 days between the swab being used and result provided back. If it’s positive, that’s 3 days of walking around positive.

2/x
This is a good effort from Google.

But this sheds concrete light on the problems of delayed test results for an acute respiratory virus.

A 3 day wait erases ~50% of the EFFECTIVENESS of the test to stop transmission. A 6 day wait erases ~90% of the effectiveness

3/x
Read 10 tweets
18 Dec
THREAD:

Incredible new study results for rapid antigen test by ⁦@AbbottNews⁩ BinaxNOW

In KIDS and adults; with symptoms and fully asymptomatic.

Sensitivity:
100% at Ct <25
98.6% at Ct <30

Specificity 99.4% - 100%

1/

mass.gov/doc/binaxnow-a…
The study above, by @NiraPollock and others, is incredibly important because it proves that these tests do not care about your symptoms, they only care about the virus. And that they work in kids as well as adults.

The former issue is critically important...

2/
Currently @US_FDA requires that for these tests to be used at home OTC, they need to demonstrate explicitly that they work in asymptomatic people.

But this is completely unnecessarily burdensome - plus finding asymptomatic people shedding virus is very difficult!

3/
Read 6 tweets
18 Dec
My 94 year old Grandma (fiancé’s Grandma) was just charged... $400 for a #COVID19 test!!

F*#^ing Criminal!

Most qPCR tests cost <$10 in reagents. Add few $ for labor/equipment.

Many commercial labs charging >$50 / test are usually preying on ppl and taking advantage.
It was not any sort of special send out overnight or anything test. It was a regular test. She went and got it in person, etc.
It was not the clinical charge.

It was not part of a bigger workup.
Read 5 tweets
15 Dec
THREAD:

First at-home rapid test w FDA EUA! This is a great milestone! Congratulations to @EllumeHealth on this triumph. The EUA for this at-home test should be celebrated. I am supportive & have used it myself! I want to put this in context...

npr.org/sections/coron…

1/10
This is a terrific milestone. An OTC rapid test is a great advance. It means some will have access to much needed test to help know status, without going through barriers of an MD.

Since many are asking, this is not quite THE public health screening test I'm calling for.

2/10
Inside, @Ellume (right) has simple but powerful paper strip test. It requires battery, circuits, sensors, and bluetooth with a mobile phone. Thus, not quite THE mass public health screening test that will scale for frequent use by millions (i.e. vs simple one on left).

3/10
Read 12 tweets
14 Dec
It PAINS & infuriates me that we continue a path of INACTION beyond a vaccine

Deaths are increasing. Yet our leaders CHOOSE to do nothing

The nation should be in an uproar!

We could ALL know our infection status daily & stop #COVID19

Instead our leaders choose dying
Pathetic.
Vaccines are great - But not getting to everyone now - and not for many months.

We have a tool now that could allow society to run MUCH safer.

Holidays spent MUCH safer
Stores and restaurants open and MUCH safer
Schools MUCH safer

This is doable, now-if our leaders wanted it.
Today, we have US companies making millions of rapid tests that people COULD be using to:

Know if their child is bringing SARS-CoV-2 virus back from school
Safely go to work, dine at restaurant, shop for groceries.

Instead US companies are forced to ship them overseas.
Read 5 tweets

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