Ryan McNamara 🧬 Profile picture
Jun 20, 2020 6 tweets 4 min read Read on X
Very proud to have been a part of this team effort here at @UNC.

High-density amplicon sequencing identifies community spread and ongoing evolution of SARS-CoV-2 in the Southern United States
biorxiv.org/content/10.110…
We show that the D614G mutant in the Spike protein of SARS-CoV-2 is becoming increasingly prevalent in symptomatic cases in North Carolina. We also show that community transmission is the primary driver of virus spread in the Tar Heel state.
This was done through deep-sequencing of 175+ SARS-CoV-2 positive samples. Our deep-sequencing approach was sensitive and accurate, complementing current testing protocols.
I want to emphasize that this work is in the pre-print stage and going through the peer-review process. We look forward to reviewers making this work better through critical and careful evaluation for final publication. This step in the scientific process is pivotal.
So much hard work by so many went into this, namely @LabDittmer, @DamaniaLab, @melmillerphd, @cmthompson15, @Easonred57, @DanielleChapp14, @Baric_Lab, & many others.
A lot of great work on SARS-CoV-2 is happening at @UNC, and I'm humbled to be a part of it.
#GoHeels
Can't believe I forgot to tag @langept. We spent many hours processing samples while our faceshields fogged up.

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More from @Ryan_Mac_Phd

Jul 25, 2022
Our latest pre-print is up!
In this study, we quantify the functional waning of non-neutralizing (effector) SARS-CoV-2 antibodies across all variants in recipients of two of the most globally administered vaccines: CoronaVac and the mRNA vaccine BNT162b2

biorxiv.org/content/10.110…
We also assess how mRNA vaccine boosters in CoronaVac recipients restore & expand functional responses against variants, particularly Omicron. This is of high global health interest as CoronaVac, an inactivated vaccine, has had billions of doses administered

So what did we find?
Effector functions wane rapidly in CoronaVac recipients, & are beneath our l.o.d. when binding antibodies are still present (~3-4 months for some FcR-binding antibodies). These functional antibodies are not only restored by mRNA vaccines, but functional breadth is expanded.
Read 5 tweets
Jul 24, 2022
The Sunday evening cookie chronicles I Image
The Sunday evening cookie chronicles II Image
The Sunday evening cookie chronicles III Image
Read 5 tweets
Nov 16, 2021
The varicella vaccination program began in 1995/6, and the incidence of chickenpox has plummeted >90%.

However, we have yet to "eliminate" varicella after 25 years of intense public health efforts and a highly effective vaccine.
SARS-CoV-2, the causative agent of COVID-19, burst onto the scene in 2019. Like varicella, vaccinations were developed that are highly effective.

However, also like varicella, getting shots into arms is not easy. And reducing incidence when prevalence is high is challenging.
Elimination efforts are extremely difficult. We've only done it a few times, and it took decades of vaccination programs, education, and public health efforts.

Trivializing pathogen elimination and setting unattainable goals can result in loss of trust in public health.
Read 5 tweets
Oct 7, 2021
This succinct breakdown of the anti-public health messaging of Fox Entertainment by @chrislhayes rings all too familiar.

Throughout last year before the vaccines, I called my family members several times a week to answer any questions or concerns
Most of them were great questions and I tried to help as best I could; but some questions were bonkers.

"Where did you hear that from!?" I would routinely ask, knowing damn well where they heard it from. From chloroquine to "herd immunity by infection", some were just insane
They're just consumers, not field-relevent experts. In fact, more often than not, they would approach the topic like "Hey I heard this and it sounded odd, is it true?" So it's hard to blame them.

This happened endlessly.
Read 4 tweets
Sep 30, 2021
Some keep stating it's a fact that infection-acquired immunity is superior to vaccine-acquired immunity. That is simply not true.

For one not everyone survives COVID-19. Severe adverse effects from vaccines can occur, but are extremely rare. That already heavily skews the data
Reports show wide variance of immune response to infection acquired immunity in survivors. Some reports show high IgG in severe COVID-19 survivors and low IgG in mild cases.
Vaccines bypass this by eliciting high IgG w/o illness
nature.com/articles/s4146…
academic.oup.com/cid/article/72…
Vaccine-acquired immunity generates similar RBD-neutralizing antibodies that COVID-19 survivors do.
Again, big difference is that they don't have to become sick with COVID-19 to do it. Especially with severe disease.

nature.com/articles/s4158…
Read 5 tweets
Sep 29, 2021
Weird because a recent CDC MMWR came to the opposite conclusion of this "fact".

In Kentucky unvaccinated individuals were ~2.3x as likely to become re-infected with SARS-CoV-2 than those who were vaccinated.

cdc.gov/mmwr/volumes/7…
There's caveats to this study and other studies have had some other mixed results.

But to present his view as a fact shows that @DrJBhattacharya is more committed to ideology than to objective science and medicine.
It's also complicated by the (ahem) "fact" that Jay is assuming everyone in the room who recovered from COVID is, you know, alive.
Read 4 tweets

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