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Pathogen Perspectives the podcast is being relaunched as Infectious Dose, in which 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, episodes with limited, mild profanity are marked as explicit. *Podcast music is adapted from Heather Nova’s song, I Miss My Sky. Used with permission.
Episodes

2 days ago
2 days ago
Is 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.

Wednesday Apr 16, 2025
Episode 6: Vaccine Safety 3 - Too Many Too Soon?
Wednesday Apr 16, 2025
Wednesday Apr 16, 2025
Heather 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.

Wednesday Apr 09, 2025
Episode 5: The Monster That is Measles
Wednesday Apr 09, 2025
Wednesday Apr 09, 2025
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.

Wednesday Apr 09, 2025
Episode 4: Vaccine Safety 2 - The Continuing Crimes of Andrew Wakefield
Wednesday Apr 09, 2025
Wednesday Apr 09, 2025
In 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.

Wednesday Apr 09, 2025
Episode 3: Vaccine Safety 1- Vaccines do NOT Cause Autism
Wednesday Apr 09, 2025
Wednesday Apr 09, 2025
In 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.

Monday Apr 07, 2025
Episode 2: Other COVID-19 Vaccine Platforms
Monday Apr 07, 2025
Monday Apr 07, 2025
This 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, Repurposed vaccines, and virus vector vaccines. Heather discusses what each platform is and their pros and cons.

Monday Apr 07, 2025
Episode 1: mRNA COVID Vaccines Explained
Monday Apr 07, 2025
Monday Apr 07, 2025
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 last
· Why those who’ve recovered from COVID-19 should get vaccinated
· Comparison between the Pfizer and Moderna mRNA vaccines and more.