Mental Floss

MEDICINE

Nurse Agnes from Uganda’s Bwindi Community Hospital prepares a vaccination against measles.

Before the measles vaccine, there were between 3 and 4 million cases in the U.S. per year. Now, it’s less than 500.

Shaunacy Ferro




Several factors make people more susceptible to the flu in winter.

Like clockwork, flu viruses seem to strike more people in winter than in any other season—and there are several reasons for that.

Matt Soniak


An illustration of red blood cells.

George Washington died after his physician treated his sore throat with bloodletting, but don't let that stop you from learning more about the human circulatory system.

Autumn Spanne


Uh oh.

The super-contagious gastrointestinal virus is causing outbreaks across the U.S. Here's how to protect yourself (and everyone around you) from norovirus.

Jennifer Billock
The world of medicine is even stranger than you can imagine.

From Alice in Wonderland Syndrome to the real-life version of Benjamin Button’s disease, these rare conditions could come straight out of a storybook.

Bethel Afful






MRSA bacteria bound to a neutrophil, a type of infection-fighting white blood cell.

Public health officials are concerned that we could move back into a situation like that of the early 20th century, before antibiotics were discovered.

Tara Smith


Love your liver.

Not only is the liver your largest internal organ; it is in charge of hundreds of bodily processes ranging from fighting infection to manufacturing proteins and hormones to helping your blood clot.

Jordan Rosenfeld


A doctor checks a young girl for swollen tonsils.

You might think they’re unnecessary, because so many people have had their tonsils removed—but tonsils actually serve an important role in your immune system.

Jordan Rosenfeld




The caduceus is used as a medical logo, but that’s not its original meaning.

This ancient symbol, also called the Staff of Hermes, depicts two snakes intertwining around a stick that is capped by wings. It’s used as a medical logo, but for almost all its roughly 5000-year history, the caduceus had nothing to do with medicine. 

Nick Keppler


Nitrous oxide (also known as laughing gas) is a common anesthetic that only requires a mask over the mouth and nose.

Anesthesia is a complex mixture of medications that lessen pain during procedures. Different types affect the body in different ways.

CaLea Johnson