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INFECTIOUS DOSE

STORIES FROM THE HIDDEN WORLD OF INFECTIOUS DISEASE

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Evidence-based science, unexpected history, emerging outbreaks, and immersive stories that take you inside that hidden world.

​From microbes and outbreaks to vaccines, medicine, history, and public health, each episode follows the evidence wherever it leads—into laboratories and archives, through past epidemics, and into the outbreaks and questions shaping public health today.​

LATEST FROM INFECTIOUS DOSE

Each episode has a companion blog post with the full transcript and annotated citations.

In September we’ll bust some of the infection myths parents hear most often, investigate the strange emergence of Candida auris (now called Candidozyma auris), take a closer look at how we think about catastrophic biological risk, and follow Salmonella from chickens and turtles to the foods in our kitchens. And we'll end the month with an Outbreak After Dark movie night to explore how infectious diseases inspire the big screen.

EXPLORE THE ARCHIVE

More than a chronological episode list, the Infectious Dose archive is organized into recurring series, themed collections, and the complete catalog.

Every story, cataloged from the beginning.

SERIES

Recurring formats within Infectious Dose, each with its own focus, style, and rhythm.

What’s happening, why it matters, and what to watch next.

The  irreverent side of infectious disease—best served with a drink.

COLLECTIONS

Curated groups of episodes that explore one subject or theme from different angles.

The evidence behind vaccine safety — examined, explained, and documented.

An October storytelling experiment with the lights turned down and the rules undone.

Field notes

The free weekly newsletter from Infectious Dose, continuing the conversation beyond the episodes with observations, outbreak signals, scientific curiosities, and glimpses behind the scenes.

Read the latest issue here:

WHAT LISTENERS ARE SAYING 

Judy Minkoff, PhD

A fantastic explainer on measles by The Infectious Dose. I can't recommend this one loudly enough. Take a listen!

Mike D., Detroit

I'm a layperson, not a scientist and definitely not a virus or vaccine expert. I felt substantially more informed about the vaccines after listening to this information.

Patrick Passarelli, MD

This was great! Thanks for answering my question in such detail. Also, the RFKjr debunk session was tops! 

THE VIROLOGIST BEHIND INFECTIOUS DOSE

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Heather McSharry, PhD, is a virologist-turned-science writer who believes infectious disease science should be rigorous without being inaccessible. Drawing on a background in infectious disease research and years of science communication, she created Infectious Dose to tell the stories behind the science—from deep dives into outbreaks and discoveries to immersive histories and experimental storytelling. Her goal is simple: make complicated science clear, compelling, and worth getting curious about.

Disclaimer: The generalized information on this website is a limited summary of diagnosis, treatment, and/or medication information. It is not meant to be comprehensive and should be used only as a tool to help the user understand and/or assess potential diagnostic and treatment options. It does NOT include all information about conditions, treatments, medications, side effects, or risks that may apply to any specific patient. It is not intended to be medical advice or a substitute for the medical advice, diagnosis, or treatment of a health care provider based on the health care provider's examination and assessment of a patient's specific and unique circumstances. Patients must speak with a health care provider for complete information about their health, medical questions, and treatment options, including any risks or benefits regarding use of any medications including vaccines. This information does not endorse any treatments or medications as safe, effective, or approved for treating a specific patient. Infectious Dose disclaims any warranty or liability relating to this information or the use thereof.

© 2025 by Infectious Dose

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