Michael Mina Profile picture
Jan 17, 2022 24 tweets 9 min read Read on X
I'm #COVID19 Positive.
Was bound to happen at some point
I feel terrible today: Fever, aches, chills (Immune mediated symptoms). Cough (maybe immune, maybe virus)

So, here we go.
I'll update this thread daily. See photo for rapid test results + infection/test result description Multiple tests from Left to...
I am exceedingly frustrated that b/c my wife & I didn't get dose 2 until 8/21 - we cannot get boosted yet

We have a 3 month old, Lila, who'd benefit greatly during Omicron by high antibodies in breast milk. But w/out my wife being boosted, Lila won't get much protection.

2/
At 0-12 hours into symptoms:
No rapid Ag or rapid molecular tests were positive

At 24 hours into symptoms: All nasal tests were bright positive
Throat swab test was fully Negative

Symptoms start earlier for many ppl now (see this thread for why ()

3/
I'm guessing ppl wondering why I used so many tests. Some may even be angry about it

It was for instructional use only

I have Demo tests for educational/research purposes only that manufacturers sent me over past 2 yrs to look at. These tests couldn't have been on shelves

4/
Ppl also wondering why I waited to get vaccines

Simple answer
I never left my house when i was working 15-18 hrs every single day on COVID through into the summer '21

I got dose 1 in May. I got dose 2 three months later bc it was biologically much more relevant than 3 weeks

5/
And my wife got dose 2 in August so that she would maximally transfer antibodies through the placenta to our infant by the time she was born.

6/
COVID Day 4: Rapid Antigen Test Self-Experiment

Updating thread

Days 2,3: Fever worse. Nasal Swab all v Pos

Day 3: Throat swab MAYBE faint Pos

Day 4:
-Fever improved ~20%
-Cough worse
-Highest virus load yet (fastest time to positivity)
-Throat swab fully Neg again

7/ Image
Day 4 from Symptom Onset:
Video of what a REALLY strong positive looks like.

Time to positivity is a measure of virus load - as is line intensity.

Here, note that the sample line (T) becomes visible AND dark before the fluid gets a chance to even hit the control line.

8/
Also on d4 I used a U-Smell-it test - a scratch and sniff test for loss of smell

Despite obvious very high viral load, sense of smell still seems largely in tact - as is taste, for now. Supports that this is Omicron - but will get sequencing too.

9/
Also, between constant wearing of N95s and this awesome Corsi-Rosenthal Box (@kprather88) we made (plus a other Hepa air filters we have and windows open -brrr), so far I'm the only one in the house w COVID.

I'll be surprised if it maintains, but we are doing what we can.

10/ Image
Day 5 since symptom start:

4 days of straight Fever and night sweats finally gone

Most symptoms gone
Some congestion
Still have cough - will probably linger for a week

Still very high positive but going in right direction. Samples took… ~15 seconds to turn Pos vs immediate Two tests - BinaxNOW very p...
Adding to the above

These are the rest of the day 5 tests. The middle one there (2nd to left) is quite old and expired for… a year now almost. So it has a very faint line, not representative.

The rest are each high positive

12/ Image
Day 6:

Symptoms resolving. Fever gone.
Cough a bit worse (normal)

*New Symptom: COVID Tongue!

Tongue and roof of mouth burning (started yesterday). Tongue looks crazy - like figure (a) in this paper:
onlinelibrary.wiley.com/doi/10.1111/bj…

Rapid Tests w Nasal swabs still all positive

13/ Image
Here's a weird thing:

I like raw garlic - always have (don't judge). (Maybe it's healthy? I don't know)

On d3 of COVID I thought I'd have a clove of it

Weird thing is: It made me vomit immediately - three times! My best guess for why: viral destruction of mucosal lining

14/
Update:
Days 1-6 Rapid Test Self Experiment/Instructional BIG Chart for #COVID19 Rapid Tests

So far, all performing v well
ArionBio "Glow Tests" best for visibility (need UV LED light) - Lab work on these show very sensitive...

Race is on: Last test to turn negative wins!

15/ Image
COVID Update
Day 7 of symptoms
Most symptoms were resolved except tongue burning and headache
Cough getting worse

5/7 tests still positive
None strong positive

Time to turn positive now about 5 minutes...

(Time-to-positive line and line intensity indicate virus load)

16/ Image
17/ COVID Update
Day 8

Most symptoms
Persistent headache and cough

Neutralizing Antibodies Appeared!
Stronger than Day 6 (see next tweet)

Only 4 tests barely hanging on with very faint positives
Tests now taking ~10 minutes to turn positive Image
18/ On Days 1, 6, 8 I used a rapid COVID antibody test that looks for anti-spike IgG binding and spike neutralization.

Day 1: Neg for neutralizing Antibodies but some IgG binding Abs

Day 6: Some neutralization

Day 8: Neutralizing signal was full strength Image
19/ COVID Update
Day 9 Since Symptom onset
Only a cough now

All rapid tests negative except the fluorescent glow test... it's very faint and really tough to see in this photo, but the positive line is there.

The line is faint & took full 12 mins to show =
VERY LOW virus load Image
20/ COVID Update Day 10

Finally! All Rapid Antigen Covid Tests negative

My cough remains, I suspect it will for some time
Post-viral coughs are very common with respiratory viruses (like SARS-CoV-2).

(In the next tweet I'll show all the tests from days 1-10) Image
21/
Finally:
#COVID19 #RapidTest self-experiment complete:

50 rapid Ag tests later!

Conclusions

• ALL of the rapid tests worked very well

• 100% (25/25) easily detected my infection days 1-5, when virus load was highest & detection most important

• All tests Neg by day 9 Image
22/

Post COVID Update:

It is now about ~10 days since my last positive result.

My wife and 4 month old remained fully Neg the whole time! (Go ventilation and N95's!)

My Post-viral cough is terrible - worse ea day (but normal for respiratory viruses)
Of course it wasn't just the N95 & ventilation for why they didn't get infected. It was

#1) Because I found out early via rapid testing that I was infectious and was able to take mitigating steps early - N95 and start intense ventilation quickly and...
#2) because they are vaccinated (or receiving antibodies via earlier placental transfer and now milk) and thus have pre-existing immunity (potentially also from a prior undiagnosed infection - should one have occurred) which offer some limited immune protection from acquisition.

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More from @michaelmina_lab

Apr 20
Here we go again with this asinine cautious approach to testing for H5N1

CDC is NOT recommending that people with no symptoms - but who have had contact w infected animals - be tested at all… and certainly are not recommending a swab w any frequency.

Though we should have learned it in 2020, Here’s why this doesnt make sense:

1/Image
Firstly, tests are our eyes for viruses. It’s literally how we see where viruses are

If we wait until people are getting sick, we may have missed a major opportunity to find viruses jumping into humans before they learn to become so efficient in us that they cause disease

2/
So waiting until we actually have highly pathogenic strains harming humans - when we have a pretty discreet population at the moment to survey - is short sighted

3/
Read 11 tweets
Jan 16
A lot of questions still on:

How long should I isolate?

Do I need to isolate?

When can I go back to work?

Is 5 days enough?

What if I’m still positive?

Why am I not positive when I first get symptoms?

This thread below (and the embedded thread) goes through many of these questions
Now that symptoms start earlier w COVID (bc immunity activates symptoms fast after exposure)

A frequent ? that comes up is what this means for Paxlovid

Often ppl think it means you have to start Paxlovid earlier

Nope - Opposite! You have more time

2/
Bc symptoms start faster but the growth of the virus still takes about the same time as it used to…

Symptom onset today is ~2d post exposure where before it was ~5d

So, as far as virus growth is concerned, day 5 post symptoms (when the trials took place) is day ~8 today

3/
Read 6 tweets
Jan 8
A heartbreaking consequence of lapses in vaccination!

A measles outbreak is spreadinf in Philadelphia.

MEASLES! It sends kids to the hospital, erases existing immune memory (creating long term risks) and kills 1 in 1000

It was eliminated in the US, but we seem hell bent on reversing that

inquirer.com/health/measles…
A particularly deadly consequence of measles is its erasure of previously acquired immune memory - setting kids and adults up for infections that they shouldn’t be at risk from!

We found for example that measles can eliminate as much as 80% of someone’s previously acquired immunity to other pathogens!
science.org/doi/full/10.11…
Image
Read 6 tweets
Jan 3
This paper from Kaiser on new XBB1.5 vax formulation is misleading

NO, it does NOT say that prior vaccination w non updated XBB1.5 vaccines offer no protection

No, it doesn’t even say the XBB1.5 updates to the vaccine formulation are important

🧵
1/
medrxiv.org/content/10.110…
Here are the key conclusions.
They are WAY misleading

The major issue is w the timing

The comparison is

A) a VERY recent XBB1.5 vaccine given in last 30 days,

Vs…

B) A vaccine received ~1 year or more ago!

Any effect is first and foremost owing to recency of vax

2/ Image
Given everything we know about major short term (weeks - few months) immune responses after vax or infections

The comparison is NOT able to say anything about the importance of updating the vaccine formulation for variants

It simply says what any Immunology 101
Text says..

3/
Read 15 tweets
Dec 24, 2023
Tip on pooling home tests

I’m gathering w family. Had one @Pfizer Lucira multiplex COVID-Flu home molecular test

Had 6 people and 6 swabs

Everyone used one swab. Dunked all 6 into one Pfizer Lucira test

Neg.

Tested everyone for price of one!

Pooling at home works!
Pooling can work w home tests including rapid antigen and rapid molecular tests

However for antigen id be a bit more cautious and not put more than 3 swabs in the buffer

With molecular, particularly Pfizer Lucira bc it has a large volume buffer, 6 is no problem.
Here’s a nasal swab that would work. Don’t use it as a nasopharyngeal swab at home - just use it like any home self swab and swab the anterior nares

a.co/d/iCO1nsI
Read 4 tweets
Dec 15, 2023
Please note - If you use expired rapid antigen tests - here's how I think about interpreting them

1) If Negative - do not trust it - especially if control line is faint / absent

BUT

2) If Positive - trust it - *very likely* true positive.

(short thread)
1/
An expired test will Not aberrantly turn positive just because it's old

Expiry makes lines not show up. Does make them become dark.

So, if using an expired test:

Do Trust a Positive.
Do Not Trust a Negative.

*And note that many tests have had extended expiry dates...

2/
Here is a thread about the extensions to the expiration dates.

Not all tests are extended but many of them have and that means that the dates on the box may be different from the actual expiration date. I write about it here and how to find out

3/

Read 4 tweets

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