Once thought to be close to eradication, cholera is back—dehydrating and killing people within hours and ravaging communities across six continents. Despite the alarming numbers of cases and deaths over the past year, decision makers are averting their eyes, leaving people to die from a preventable and treatable disease.

The healthcare community should sound the alarm for immediate actions. A strong and global emergency response is urgently needed, but it is only a first step. More than ever the world must invest in water and sanitation systems and prepare communities before outbreaks occur.

Over the past 200 years, there have been seven cholera pandemics, and today’s surge is the largest in a decade. In 2022, 30 countries reported cholera outbreaks, including places that had been free of the disease for decades. In Haiti, where millions of people have been displaced by violence, cholera has killed hundreds of people in just a few months.1 Lebanon is experiencing its first outbreak since 1993, with more than 6000 recorded cases.2 After devastating floods, Nigeria had a major cholera outbreak.3 In Malawi, the worst outbreak in decades has left 620 people dead since March.4 Schools are now closed in an attempt to stop the surge of infections.