Mozambique is fighting a cholera outbreak that has reached 12,400 confirmed cases and 72 deaths, a case fatality rate of 0.6%. PandemicAlarm rates this event at 4/5 severity. Cyclone-displaced populations, destroyed water infrastructure, and a global vaccine shortage are converging into a crisis with no quick resolution.
What's driving the outbreak?
Cyclone damage shattered water and sanitation systems across southern Mozambique. Hundreds of thousands of displaced people crowded into temporary shelters with limited access to clean water and functioning latrines. Cholera thrives in exactly these conditions. Vibrio cholerae spreads through contaminated water and food, and when waste systems fail, the bacteria cycle rapidly through dense populations.
Maputo province has been hit hardest. Overcrowded displacement camps and urban areas where flood damage overwhelmed sewage systems account for the majority of cases. Children under 5 and elderly residents face the highest mortality risk.
Why can't vaccines solve this?
Global oral cholera vaccine (OCV) supplies are critically strained. WHO reduced the recommended dosing schedule from 2 doses to 1 dose per person in 2022 because there simply weren't enough vaccines to go around. Stocks have not recovered. Only one manufacturer, EuBiologics in South Korea, produces the WHO-prequalified OCV at scale, and production capacity cannot keep pace with simultaneous outbreaks in Mozambique, DRC, Bangladesh, and other affected countries.
Single-dose protection is weaker than the original two-dose regimen, providing roughly 40% efficacy over 6 months compared to over 65% for the full course. Mozambique has received limited OCV shipments from the global stockpile, but coverage remains far below what's needed to break transmission chains.
How does this fit the global cholera picture?
Mozambique's outbreak is not happening in isolation. Cholera has resurged worldwide since 2021, with active outbreaks simultaneously affecting more than 30 countries. DRC, Haiti, Afghanistan, Syria, Bangladesh, and Ethiopia are all battling their own cholera crises. Global case counts in 2024-2025 reached levels not seen in over a decade, driven by climate-related disasters, conflict displacement, and decaying water infrastructure.
When multiple large outbreaks compete for the same limited vaccine supply, humanitarian agencies face impossible allocation decisions. Mozambique's allocation depends on global demand, not just its own need. A new cholera surge in another country can directly reduce the doses available for Maputo's displaced communities.
What Should You Watch Next?
Rainy season runs through April, and additional flooding could worsen conditions in displacement camps and recontaminate water sources that have been partially restored. A case fatality rate of 0.6% is within the expected range for cholera with treatment access, but if healthcare facilities become overwhelmed, that number will climb. Neighboring countries including Malawi and Zimbabwe are also monitoring for cross-border spread.
Oral rehydration therapy remains the most effective immediate intervention, reducing cholera mortality from over 50% (untreated) to below 1% (treated). Access to oral rehydration salts and clean water is the difference between a manageable outbreak and a catastrophe.
Track this outbreak on the PandemicAlarm map for updated case counts and geographic spread. For context on how cholera fits into the broader disease risk profile of the region, see disease risks by region.