Katrine L. Wallace

Cholera is common in parts of the world where clean water sources are unreliable. Sudan has suffered multiple outbreaks since the onset of a civil war in 2023. AFP via Getty Images

Cholera still kills thousands each year – in places without clean water, it’s far from history

While cholera launched modern epidemiology and has nearly disappeared in many countries, the disease never went away. It has instead retreated to the places least equipped to fight it.
Passengers on the the hantavirus-stricken cruise ship MV Hondius watch epidemiologists board the boat in Praia, Cape Verde, on May 6, 2026. AP Photo/Uncredited

From medieval plague ships to hantavirus: How outbreaks at sea helped to shape the international public health system

To stop the spread of infectious diseases, governments need information and other resources that countries around the globe share through international organizations.
L’armée opère généralement dans des conditions – caserne, navire, etc. – qui favorisent la propagation des virus respiratoires. Bumble Dee/Shutterstock

L’abandon d’une stratégie vieille de 250 ans… Ce que change la fin de l’obligation vaccinale dans l’armée américaine

Pendant près de quatre-vingts ans, la vaccination contre la grippe allait de soi dans l’armée états-unienne. Sa remise en cause récente ne repose pas tant sur des arguments médicaux que sur une évolution politique autour de la notion de « liberté médicale ».
A lawsuit brought by six medical organizations seeks to block several changes that federal health officials made to vaccine policy. Jackyenjoyphotography/Moment via Getty Images

Federal judge temporarily blocks RFK Jr.’s vaccine agenda – an epidemiologist answers questions parents may have

The judge’s decision is a win for public health, but the back-and-forth on vaccine policy may undermine the public’s trust in science.

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