top of page
Infectous Dose Episodes


The Vaccine Executive Order: What You Need to Know
What does the August 10 vaccine executive order actually do? A clear look at childhood vaccine changes, MMR, access, insurance, and what parents should know.

Heather McSharry, PhD
2 hours ago17 min read


Outbreak Watch: August 7, 2026
Outbreak Watch: Get the latest updates on Active Outbreaks, Global Signals, and Surveillance Milestones

Heather McSharry, PhD
4 days ago16 min read


Morning Swim: The Hidden Microbial World of Freshwater Lakes
Explore the hidden microbial world of freshwater lakes, including swimmer's itch, harmful algal blooms, Naegleria fowleri, and how scientists monitor water quality.

Heather McSharry, PhD
6 days ago16 min read


For Medicinal Purposes: Whiskey, Jazz, and Germs
Step inside a 1920s speakeasy to explore medicinal whiskey, Prohibition, and the surprising history of medicine before antibiotics.

Heather McSharry, PhD
Jul 295 min read


Do No Harm: The Birth of Infection Prevention
Summary For centuries, hospitals were places where patients often acquired deadly infections instead of recovering from illness. In this final installment of our Turning Points in Infectious Disease series, we trace the remarkable transformation that changed that reality. From Ignaz Semmelweis's controversial handwashing campaign in a Vienna maternity ward to Louis Pasteur's germ theory, Joseph Lister's antiseptic surgery, and Florence Nightingale's vision for cleaner, health

Heather McSharry, PhD
Jul 2116 min read


Outbreak Watch: July 17, 2026
Outbreak Watch: Get the latest updates on Ebola, New World screwworm, U.S. cyclosporiasis, H5 avian influenza, and why disease surveillance matters.

Heather McSharry, PhD
Jul 1611 min read


A Shot in the Dark: The Science That Outsmarted Smallpox
Discover how Edward Jenner's bold experiment transformed medicine, launched the science of vaccination, and helped eradicate smallpox in this episode of Infectious Dose exploring one of history's greatest public health turning points.

Heather McSharry, PhD
Jul 1521 min read


Holding the Line: How Prevention Became Military Strategy
Discover how infectious disease transformed military history in Holding the Line: How Prevention Became Military Strategy. From George Washington and Florence Nightingale to Walter Reed, military vaccination, COVID aboard the USS Theodore Roosevelt, and today's influenza outbreaks, explore the history of force health protection and preventive medicine.

Heather McSharry, PhD
Jul 819 min read


On the Fly: Lessons From a Screwworm
Podcast episode on New World screwworm: how sterile insect releases eradicated a flesh‑eating parasite from North America, why Texas is seeing new screwworm cases in 2026, and what this outbreak reveals about prevention and the consequences of disabling the public health infrastructure that protects us.

Heather McSharry, PhD
Jul 118 min read


Dusk Hunters: The Anatomy of a Blood Meal
Why do mosquito bites itch? In this Outbreak After Dark episode, explore how mosquitoes find hosts, take blood meals, spread disease, and trigger the immune response—all from the perspective of a Gulf Coast summer night.

Heather McSharry, PhD
Jun 247 min read


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
Jun 1913 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
Jun 175 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


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


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


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


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


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


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
bottom of page