Heather McSharry, PhD's Avatar

Heather McSharry, PhD

@pathogenscribe

Virologist turned science writer. She/her. Fighting science misinformation with a podcast/blog. Infectiousdose.com My views are my own & do not represent any organization

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18.02.2024
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Latest posts by Heather McSharry, PhD @pathogenscribe

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Under the Skin: The Evolving Story of Mpox Mpox explained: symptoms, transmission, viral evolution, clade Ib, vaccines, global health inequity, and why scientists are watching the virus closely.

NEW EPISODE LIVE!
Mpox isn’t over.
The virus is still evolving.
In the new episode I break down:
🧬 viral evolution
🦠 clade Ib
🌍 spillover ecology
πŸ”¬ genomic surveillance
Why this virus still matters.
🎧 Listen or read here: infectiousdose.com/post/under-t...
#InfectousDose #Mpox

04.03.2026 17:24 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Still with Her. ❀️

27.02.2026 01:55 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Love Bites: Microbes That Hijack Infection From zombie ants to Toxoplasma gondii, this Outbreak After Dark episode explores parasites that manipulate love, fear, and matingβ€”and what that means for humans.

🎧NOW LIVE
It’s not a love story.
It’s a transmission strategy.
Parasites that hijack fear.
Viruses that sabotage courtship.
Fungi that demand altitude.

πŸŽ™οΈLove Bites: Microbes That Hijack Affection, is live. #InfectiousDose #OutbreakAfterDark
www.infectiousdose.com/post/love-bi...

26.02.2026 02:23 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Here's how a year of RFK, Jr., has changed American science After a year of RFK, Jr., heading the Department of Health and Human Services, the β€œMake America Healthy Again” movement has upended science and medicine

A good read, summarizing what has happened to science & medicine since Kennedy's confirmation.

His anti-vaccine stance is behind measles outbreaks, is causing an exodus of next gen scientists, turning pharma companies away from investing in American R&D.
πŸ§ͺ www.scientificamerican.com/article/how-...

23.02.2026 21:59 πŸ‘ 212 πŸ” 169 πŸ’¬ 17 πŸ“Œ 8
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Love isn’t always what it seems.
Sometimes it’s hijacked by microbes.
🐭 Mice flirting w/ cats
🐜 Ants climbing to their doom
🦠 Viruses rewriting profiles
Tomorrow night, Midnight CST. πŸ”₯
Recipes attached.
Make your own & join us!
#InfectiousDose #OutbreakAfterDark

23.02.2026 21:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Kinda weird that the party that controls the House, the Senate, and the White House claims there's rampant voter fraud.

19.02.2026 19:11 πŸ‘ 30167 πŸ” 8712 πŸ’¬ 1151 πŸ“Œ 462
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19.02.2026 19:42 πŸ‘ 36226 πŸ” 14164 πŸ’¬ 471 πŸ“Œ 659

Holy shit.

20.02.2026 00:48 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

we couldn't use government funds to buy coffee (like, folgers ground coffee) when i worked on a CDC outbreak emergency response

19.02.2026 15:58 πŸ‘ 6465 πŸ” 1901 πŸ’¬ 147 πŸ“Œ 47
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At the Edge of Spillover: The Nipah Paradox Nipah virus is deadly but rarely spreads far. Learn why Rβ‚€ stays low, what would trigger a pandemic shift, and why spillover recurs in Kerala.

New episode is live:
At the Edge of Spillover – The Nipah Paradox

High fatality. Neuroinvasion. Human-to-human transmission.
And yet… it burns out.

Why does a virus this formidable fail to go pandemic?

🎧 Listen here: infectiousdose.com/post/nipah-paradox

#InfectiousDose

18.02.2026 19:53 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Nipah virus checks uncomfortable boxes:

β€’ High fatality rate
β€’ Human-to-human transmission
β€’ Neuroinvasion
β€’ Fruit bat reservoir
β€’ No licensed vaccine

So why does it keep burning out?

🎧New episode drops tomorrow at midnight CST.

#InfectiousDose

17.02.2026 00:51 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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The Syphilis Surge: Echoes of Betrayal in a Broken Health System Explore the resurgence of syphilis, its public health impact, treatment challenges, and the legacy of mistrust from Tuskegee to today.

Babies are being born with syphilis in 2026.
It’s curable. It’s preventable. And it’s a public health failure.
πŸŽ™οΈ New episode: β€œThe Syphilis Surge: Echoes of Betrayal in a Broken Health System”
Listen here β†’ www.infectiousdose.com/post/syphili...
#InfectiousDose #STIs #Tuskegee

12.02.2026 00:43 πŸ‘ 7 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0

Thanks for posting this @mackayim.bsky.social

I have been talking about this for years and how its not just the acute infection but rather the increased risk to subsequent infections that is particularly concerning

07.02.2026 04:26 πŸ‘ 49 πŸ” 18 πŸ’¬ 3 πŸ“Œ 0
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2 active cases of tuberculosis confirmed at Camp East Montana Two cases of tuberculosis have been confirmed at Camp East Montana in El Paso County.

I have been informed by U.S. Rep. Veronica Escobar and confirmed by the City of El Paso, Texas that there are two known active cases of tuberculosis registered at Camp East Montana. There are also at least 18 cases of COVID-19.

I had been hearing rumors of this from my contacts for weeks.

06.02.2026 17:34 πŸ‘ 268 πŸ” 221 πŸ’¬ 10 πŸ“Œ 18

Good to hear. πŸ™β€οΈ

07.02.2026 00:00 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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From Spillover to Weapons: A Conversation with Conor Browne on Biological Threats A biodefense expert explains what biological weapons really are, why most pathogens aren’t weapons, and how misinformation increases real biological risk.

I interviewed @brownecfm.bsky.social about this a couple weeks ago. His perspective is invaluable.

www.infectiousdose.com/post/biorisk...

06.02.2026 23:59 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Children trapped in Texas immigration facility recount nightmares, inedible food, no school A photo of Liam Conejo Ramos, a scared 5-year-old, drew attention to a detention center in Dilley, Texas. Advocates say his experience reflects what hundreds of children have endured out of public vie...

An immigration atty repping families at a detention facility said a child suffering from appendicitis collapsed in pain after being denied meaningful med attn. "The child passed out in a hallway vomiting and writhing ... only to be offered Tylenol" www.nbcnews.com/news/us-news... @mikehixenbaugh.com

06.02.2026 21:37 πŸ‘ 31 πŸ” 27 πŸ’¬ 1 πŸ“Œ 1

Ex husband says that. I explained he was always surrounded by the vaccinated. He got flu last week and ended up hospitalized after a 911 call. He gave it to my son who gave it to me. I’m vaccinated so it hasn’t been severe but it’s worse than not having the flu at all! I’m so tired of this.

06.02.2026 17:51 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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If you or your loved ones are in need of a KN95 Mask (or like... many of them), drop by our office at 132 Main Street in Fredericton during office hours and fill your boots!

Masking up is a simple way to help protect your community and lighten the burden on our health care system. #NewBrunswick

03.02.2026 11:15 πŸ‘ 12 πŸ” 9 πŸ’¬ 0 πŸ“Œ 0

ICE is composed of pardoned felons

06.02.2026 13:30 πŸ‘ 4 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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On Silence, Science, and Complicity: A Statement From Infectious Dose Podcast Episode Β· Infectious Dose Β· 06/02/2026 · Bonus Β· 3m

β€œThis episode is not a scientific explainer & not an invitation to debate. It exists to make clear where this podcast stands, why silence is not an option, why evidence, accountability & human rights are inseparable from public health” @infectdosepodcast.bsky.social

06.02.2026 07:18 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Canada rolls out whalesafe strategy to curb right whale entanglements | CBC News The federal government is rolling out its "whalesafe fishing gear strategy," a five-year plan to develop and support the use of new fishing gear to reduce the risk of entangling whales β€” specifically ...

Entanglement is one of the greatest threats to whales around the globe. It's a complex problem, but we hope Canada's new "whalesafe" strategy finds success on the east coast, and that similar action will be taken on the west coast soon.

www.cbc.ca/news/canada/...

05.02.2026 21:13 πŸ‘ 36 πŸ” 13 πŸ’¬ 1 πŸ“Œ 0
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Statement of Ethics | Infectious Dose Statement of ethics for Infectious Dose, explaining why silence is not neutral and why science, public health, and human rights are inseparable.

A brief statement clarifying the ethical boundaries of #InfectiousDose is now live.
www.infectiousdose.com/statement-of...

06.02.2026 00:42 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

We gotta come up with a better system than β€œeverything rests on whether these twelve billionnaires are nice”

04.02.2026 19:41 πŸ‘ 26881 πŸ” 6378 πŸ’¬ 385 πŸ“Œ 224

Or, and hear me out, don't upload photos and videos that could facilitate a statewide takeover of your local school district and arbitrary consequences for children.

04.02.2026 22:02 πŸ‘ 34 πŸ” 13 πŸ’¬ 2 πŸ“Œ 0
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04.02.2026 19:53 πŸ‘ 2691 πŸ” 845 πŸ’¬ 34 πŸ“Œ 33

More of this, please!!!

05.02.2026 01:37 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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How to Glow in the Dark | Anna Sproul-Latimer | Substack Book publishing advice and community for authors of fiction and nonfiction, written by the agents at Neon Literary. Click to read How to Glow in the Dark, a Substack publication with tens of thousands...

If you're a Post journalist who got laid off today: 1. [pats bench] come sit by us, is it time to go get that book deal?; and 2. even if not, I'd be happy to comp you a free year's subscription to "How to Glow in the Dark" if you reach out this week. neonliterary.substack.com?utm_campaign...

04.02.2026 19:33 πŸ‘ 11 πŸ” 9 πŸ’¬ 1 πŸ“Œ 0
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RSV: Symptoms, Spread, and Prevention RSV explained: symptoms, red flags, treatment, and prevention. What parents and caregivers need to know about this common respiratory virus.

RSV is common. Severe disease doesn’t have to be.

A clear, evidence-based episode on what RSV is, how it spreads, and how we protect infants and families today.

🎧 Now live at #InfectiousDose
www.infectiousdose.com/post/__rsv

04.02.2026 18:27 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Yale University and Boehringer Ingelheim Biomedical Data Science Fellowship Program Yale University, in partnership with Boehringer Ingelheim, one of the world’s leading pharmaceutical companies, launched in 2021 a Biomedical Data Science

A long-term dream of mine has been to bridge @viralemergence.org's work on AI/ML-driven viral risk assessment with AI/ML-driven work on drug discovery. This would make a great topic for this fellowship here at Yale! If you're interested in applying, reach out. medicine.yale.edu/biomedical-d...

02.02.2026 17:30 πŸ‘ 6 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0