Infectious dose is the shot of science you need to protect yourself from misinformation. Heather McSharry, PhD, an expert in viral pathogenesis, brings her blog to the airwaves to help bridge the dangerous gap between the science of infectious diseases and public misperception. On the podcast website, infectiousdose.com, all episodes have corresponding blog posts with the information contained in the episode along with links or PDFs for all sources used. To prevent unwelcome surprises, episo ...
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Episode 15: Protection, Interrupted: How Chasing Sterilizing Immunity Fails the Herd
30:05
30:05
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30:05What if our biggest mistake in vaccine communication wasn’t misinformation—but misexpectation? In this episode of Infectious Dose, Heather digs into the seductive myth of sterilizing immunity—the idea that a “perfect” vaccine blocks infection completely—and explores how this scientific fable has distorted public expectations, undermined trust, and …
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Episode 14: No Name, No Mercy: The Hantavirus That Killed Betsy Arakawa
1:09:29
1:09:29
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1:09:29In this episode, Heather delves into the story of Sin Nombre virus and the disease it causes, Hantavirus Pulmonary Syndrome. From its rodent origins and rapid progression to the public health response and scientific breakthroughs that followed, we explore how a rare virus rewrote the rules of infectious disease in North America—and why it remains a…
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Episode 13: Un-Vaccinated - the Global Measles Emergency
1:06:50
1:06:50
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1:06:50Heather gives updates on 2025 measles outbreaks in every region of the world and discusses global efforts to curb them. She also debunks the deadly lies about measles from RFK Jr. in her fan favorite segment WTF-RFK! and answers listener questions in her new segment Hot Zone Hotline. Explicit rating is for mild and limited profanity because, I mean…
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Episode 12: Vaccine Safety 6 - Expecting Protection: Building vaccine confidence for moms-to-be
49:53
49:53
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49:53Pregnant and wondering which vaccines are safe? Heather separates myths from facts & shares exactly what science says about vaccine safety during pregnancy—because you and your baby deserve the best protection!By Infectious Dose
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Episode 11: Close Quarters, Silent Threat - Invasive Meningococcal Disease in Dorms and Barracks
54:24
54:24
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54:24Invasive meningococcal disease strikes fast—and often without warning—especially in close-contact environments like college dorms and military barracks. While it’s rare, the consequences can be devastating: death within hours, or lifelong complications like limb loss and brain damage. In this episode Heather explains all about how Neisseria meningi…
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Episode 10: Vaccine Safety 5 - Inside the Vial: the Truth About What’s Actually in Vaccines
41:19
41:19
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41:19In the 5th episode in her vaccine safety series, Heather gives straightforward, science-based answers to some of the most common questions about what’s in vaccines including an in-depth look at what's in several specific vaccines and the truth debunking false claims you've seen recently in the media.…
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Episode 9: Sleeper Cells - How Anthrax Hides, Strikes, and Could One Day Heal
42:22
42:22
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42:22Anthrax is one of the oldest infectious diseases known to science. Its ability to survive harsh environments and reemerge as a deadly pathogen centuries later is a biological marvel—and a global health concern. Heather covers all you want to know about anthrax from its formidable spore structure and use as a bioweapon, to its recent outbreaks and p…
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Episode 8: Vaccine Safety 4 - The Vaccine Court and Adjudication of Autism Cases
34:38
34:38
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34:38Heather digs in to the truth about the vaccine court and how its history of claims supports that vaccines are safe! Explicit rating for mild, limited profanity.By Infectious Dose
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Episode 7: Fowl on the Play as Bird Flu Heats Up
26:48
26:48
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26:48Is bird flu’s resurgence a warning sign worth heeding? Heather digs into the science, the stakes, and what this latest avian alarm could mean for global health. Explicit rating for mild, limited profanity.By Infectious Dose
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Episode 6: Vaccine Safety 3 - Too Many Too Soon?
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17:12Heather goes in-depth on why the current vaccine schedule is safe and effective for children and newborns. Infectiousdose.com Marked explicit for possible limited, mild profanity.By Infectious Dose
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Episode 3: Vaccine Safety 1- Vaccines do NOT Cause Autism
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17:03
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17:03In the first of several episodes on vaccine safety, Heather explains how we know vaccines are safe and do not cause autism. She provides all her sources and links in the corresponding blog post at Infectiousdose.com. Marked explicit for limited and mild profanity.By pathogenperspectives
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Episode 4: Vaccine Safety 2 - The Continuing Crimes of Andrew Wakefield
21:22
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21:22In the second vaccine safety episode, Heather describes how Andrew Wakefield's fraudulent science cost the world the elimination of measles and hurt children. With evidence to back it up, she goes into detail on what he did and how he still manipulates parents fears to make money. Marked explicit for limited and mild profanity.…
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Heather delivers the scoop on the disease caused by measles, including symptoms, transmission, prevention, treatment, what's in the very safe vaccines, and dangerous complications and long-term health problems of natural infection. Marked explicit for possible limited, mild profanity.By pathogenperspectives
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Episode 2: Other COVID-19 Vaccine Platforms
38:11
38:11
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38:11This is the original Pathogen Perspectives episode rebranded for Infectious Dose, originally published in 2020. Heather provides an in-depth discussion on the COVID-19 vaccine platforms other than mRNA, that were in clinical trials around the world. These include self-replicating mRNA, DNA, Protein-based, Attenuated virus, Inactivated virus, Repurp…
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This is the original Pathogen Perspectives Episode published in 2020, rebranded for Infectious Dose. Heather provides an in-depth discussion on the COVID-19 mRNA vaccines authorized for emergency use in the US. She covers: · What is mRNA · How mRNA vaccines work · How we know they are safe · Why they cannot change your DNA · How long might immunity…
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