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Marina Spelzini, a registered nurse, measures out an H1N1 vaccine shot at the Miami Dade County Health Department downtown clinic on November 3, 2009 in Miami, Florida. (influenza, swine flu)

When Was the Last Pandemic?

People wearing surgical masks (also called face mask or medical masks or safety masks) walk through the city center of Milan, Italy on Feb. 23, 2020. Coronavirus disease COVID-19 pandemic

How Do Face Masks Control the Spread of Disease?

Infographic on the Influenza Pandemic of 1918-19

Influenza Pandemic of 1918–19 Chart

Scanning electron micrograph showing the spiral-shaped bacteria of the genus Leptospira. These organisms cause leptospirosis.

8 Zoonotic Diseases

Scan of human brain

What Are the Symptoms of a Stroke?

Discover

Marriage. A couple getting married during a church wedding ceremony. (religion, ceremony, bride, groom)

The Seven Sacraments of the Roman Catholic church

The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)

New Seven Wonders of the World

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Artist interpretation of a Space meteoroid impact. Meteor impact. Asteroid, End of the world, danger, destruction, dinosaur extinct, Judgement Day, Planet Earth, Doomsday Predictions, comet

10 Failed Doomsday Predictions

Statue of Nostradamus

Nostradamus and His Prophecies

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

Agnes with a lamb near her feet. St. Agnes (Saint Agnes) design drawing for stained glass window by J&R Lamb Studios, ink, mount size 10.5 x 14.5 in.

Roman Catholic Saints

nagana: Related Content

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Topics

tsetse fly trypanosomiasis disease animal disease malaria zoonotic disease avian malaria foot-and-mouth disease rabies pica leishmaniasis hookworm disease babesiosis

Key People

David Bruce

British physician

Quiz

44 Questions from Britannica’s Most Popular Health and Medicine Quizzes