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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, episodes with limited, mild profanity are marked as explicit. *Podcast intro and outro music are adapted from Heather Nova’s song, I Miss My Sky. Used with permission.
Episodes

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.
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