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Outbreak Watch: Line of Sight
Outbreak Watch: Line of Sight examines the growing Ebola outbreak in the DRC, the Hondius hantavirus response, and emerging screwworm detections in the U.S., exploring how surveillance, visibility, and uncertainty shape outbreak response.

Heather McSharry, PhD
2 days ago13 min read


Field Notes #10: Eavesdropping
Petrichor feels deeply human, but the smell of rain may not be for us at all. A look at geosmin, animal behavior, and the ecological signals hidden in summer storms.

Heather McSharry, PhD
3 days ago5 min read


Listening for Rain: Microbes, Memories, and Summer Storms
Why can we smell rain? Explore the science of petrichor, geosmin, soil microbes, and the memories connected to summer storms in this immersive podcast episode.

Heather McSharry, PhD
3 days ago5 min read


Field Notes #9: The Long Way Home
What follows us home from a walk in the woods? This issue of Field Notes explores summer ecosystems and the unseen exchanges between people and nature.

Heather McSharry, PhD
Jun 106 min read


The Tick, the Table, and the Timeline: How a Tick Bite Rewrites Dinner
How can a tick bite make someone allergic to red meat months later? Explore the mystery, science, diagnosis, and history of alpha-gal syndrome in this episode of Infectious Dose.

Heather McSharry, PhD
Jun 1027 min read


Field Notes #8: Standing Watch
Standing Watch On the quiet machinery of survival Field Notes is where I take one idea from the episode—something that feels like a hinge point—and follow it to see what it reveals. If you want the full story, you can read or listen to the episode here. In the Margins When people think about public health, they usually picture things with obvious health labels. Vaccination campaigns. Disease surveillance. Health departments. Epidemiologists tracking outbreaks. They rarely pic

Heather McSharry, PhD
Jun 44 min read


Storm Surge: Microbes in the Wake of a Hurricane
Hurricanes don't create pathogens—they change exposure. Learn about floodwater infections, mold, mosquitoes, food safety, and hurricane preparedness in this Infectious Dose episode.

Heather McSharry, PhD
Jun 311 min read


Outbreak Watch: Exactly as Expected
Outbreak update covering the Bundibugyo Ebola outbreak in DRC and Uganda, the Andes hantavirus cruise cluster, and growing global public-health strain.

Heather McSharry, PhD
May 2811 min read


Field Notes #7: Exposure Archives
Exposure Archives On the histories infection writes into us Field Notes is where I take one idea from the episode—something that feels like a hinge point—and follow it to see what it reveals. If you want the full story, you can read or listen to the episode here. In the Margins There’s a moment in this episode that won’t let go of me. Not the courtroom, not the verdict. It’s the nurse in Louisiana, at home, half-asleep, the familiar weight of someone she’d trusted for a decad

Heather McSharry, PhD
May 275 min read


Recorded in Blood: When True Crime Goes Viral
Outbreak After Dark explores the true crime case that brought forensic virology into court and asked: can a virus testify?

Heather McSharry, PhD
May 275 min read


Field Notes #6: Blind Spots
Blind Spots On viruses, visibility, and the signals we miss Field Notes is where I take one idea from the episode—something that feels like a hinge point—and follow it to see what it reveals. If you want the full story, you can read or listen to the episode here. In the Margins Somewhere in almost every Ebola outbreak, there’s a moment when the virus is already there, but the tools built to recognize it are still looking for something else. In Yambuku in 1976, clinicians thou

Heather McSharry, PhD
May 205 min read


Containing Ebola: Fear, Caregiving, and Outbreak Response
What is Ebola really — and how does it spread? This episode explores Ebola transmission, pathogenesis, outbreak history, and the 2026 Bundibugyo Ebola outbreak in DRC and Uganda.

Heather McSharry, PhD
May 2031 min read


Field Notes #5: Walking the Line
Walking the Line On risk, reassurance, and the lines that divide us Field Notes is where I take one idea from the episode—something that feels like a hinge point—and follow it to see what it reveals. If you want the full story, you can read or listen to the episode here. In the Margins Somewhere during an outbreak investigation, a contact tracer has to decide whether someone “counts” as an exposure. Two passengers sat beside the same infected person on a flight. One was there

Heather McSharry, PhD
May 133 min read


Hantavirus on the High Seas Part 2: What Changed, What Didn’t, and Why the Conversation Got So Messy
Part 2 of Infectious Dose’s Andes virus cruise ship investigation explores new genomic evidence, WHO guidance, person-to-person transmission, and the public-health communication challenges surrounding the MV Hondius hantavirus outbreak.

Heather McSharry, PhD
May 1324 min read


Field Notes #4: In Memoriam
In Memoriam On uncertainty, memory, and the stories outbreaks inherit Field Notes is where I take one idea from the episode—something that feels like a hinge point—and follow it to see what it reveals. If you want the full story, you can read or listen to the episode here. In the Margins One of the hardest things about modern outbreak communication is that people no longer hear scientific language in isolation. They hear it through memory. “Airborne” is no longer just a techn

Heather McSharry, PhD
May 64 min read


Hantavirus on the High Seas: How We Talk About Outbreaks When the Evidence Is Still Coming In
A science-based breakdown of the hantavirus cruise outbreak, including airborne transmission, Andes virus, person-to-person spread, and how to communicate honestly during evolving outbreaks.

Heather McSharry, PhD
May 512 min read


Field Notes #3: It Passes Between Us
Issue #3 It Passes Between Us On transmission, transformation, and the language before pathogens Welcome to Field Notes. Each week, I take one idea from the episode and follow it where it leads. For Outbreak After Dark, that idea isn’t just biological—it’s how we make sense of what we don’t fully understand. If you want the full story, you can read or listen to the episode here. In the Margins There’s a line in the episode about garlic—how it shows up both in early infection

Heather McSharry, PhD
Apr 292 min read


Remedies and Regrets: The Worst Infection Treatments in History
A deep dive into the strangest medical treatments in history—from bloodletting and mercury to tobacco smoke enemas and early infection therapies—exploring how medicine evolved before germ theory and what those practices reveal about the origins of modern science.

Heather McSharry, PhD
Apr 296 min read


Field Notes #2: When Infection Doesn't End
Issue #2 When Infection Doesn't End On persistence and what gets lost when infection is treated as an event Welcome to Field Notes . Each week, I take one idea from the episode—something that feels like a hinge point—and follow it where it leads. Not to repeat the science, but to see what it reveals. If you want the full story, you can read or listen to the episode here . In the Margins Most of the time, we treat infection like something that declares itself and then resolves

Heather McSharry, PhD
Apr 223 min read


The Call Came From Inside: Epstein–Barr virus and the biology of persistence
Summary Epstein–Barr virus is one of the most common infections in the world—by adulthood, nearly 95% of people carry it. Most remember it, if at all, as “just mono.” A brief illness. A recovery. The end of the story. Except it isn’t. EBV doesn’t leave. It stays—inside the very immune cells responsible for remembering infection. For most people, it exists quietly, held in check by the immune system. But under certain conditions, that balance can shift, linking this common vir

Heather McSharry, PhD
Apr 2214 min read
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