Cholera keeps spreading: WHO’s multi-country update shows rising cases and deaths
World Regional Impact and Emerging Crisis Scan – WHO’s cholera update #38 (June 30) shows a 43% case surge and 30% death increase across 16 countries in May.
WHO’s latest cholera epidemiological update shows a renewed upswing across multiple countries. In data covering May 2026 (epidemiological weeks 19–22), WHO reported 29,610 new cholera and acute watery diarrhoea (AWD) cases and 271 cholera-related deaths globally. Compared with the previous month, WHO estimated a 43% increase in new cases and a 30% increase in deaths. WHO also reported that no cases were reported during this period from the European Region or the Western Pacific Region.
What changed in WHO’s latest numbers
WHO published this as epidemiological update #38 on June 30, 2026, with data as of 31 May 2026. The report frames the pattern as part of an ongoing cholera upsurge, not a one-off flare.
There’s also an important context note: WHO says these month-over-month comparisons can be affected by underreporting, reporting delays, and differences in surveillance and case definitions across countries. WHO cautions that those factors can limit direct comparability across settings.
Even with the rise versus the previous month, WHO reported that cases in May 2026 were 59% lower than the same period last year, and deaths were 61% lower—suggesting the current wave is “up” relative to recent gains, while still below last year’s levels for the same months.
Where the rise is showing up
For the May 2026 period, WHO said cases were reported from 16 countries, territories, and areas across four WHO regions, with the Eastern Mediterranean Region recording the highest case counts, followed by the African Region, then South-East Asia, and the Region of the Americas.
Eastern Mediterranean Region (May 2026): WHO reported the most cases from Afghanistan, alongside Yemen, Pakistan, and Sudan—and Sudan accounted for most cholera-related deaths in that region.
African Region (May 2026): WHO reported the highest numbers of cases from Nigeria and the Democratic Republic of the Congo, along with Angola and South Sudan. Cholera-related deaths were concentrated in the Democratic Republic of the Congo, Nigeria, and Angola.
Other regions (May 2026): WHO reported cases from Myanmar in South-East Asia and cases from Haiti in the Americas during this period, with no cholera-related deaths reported in those regions in May.
Across the longer window from Jan. 1 to May 31, 2026, WHO reported 114,829 cholera/AWD cases and 1,318 deaths across 23 countries, again concentrated in Africa and the Eastern Mediterranean.
Why the upswing is hard to contain
WHO’s cholera upsurge situation page links the repeated waves to conditions that make contamination and rapid spread more likely—especially where safe water and sanitation are limited. WHO notes that climate extremes and conflict can reduce access to clean water and worsen outbreak conditions.
WHO also highlights a practical constraint for response: global capacity is being stretched and there is a shortage of cholera tools, including vaccines. WHO describes the overall global risk as very high and says it is responding urgently to reduce deaths and contain outbreaks.
What this means for U.S. readers—especially travelers and aid workers
Cholera spreads through contaminated food and water, and CDC says cholera activity varies by location even within a country. CDC’s traveler guidance focuses on avoiding unsafe food and water and washing hands frequently in outbreak settings.
CDC also explains that cholera vaccination is not routinely recommended for most travelers because cholera is rare for travelers and most people do not visit areas with active transmission. When vaccine is available, CDC says to consider vaccination based on the destination’s transmission level and the traveler’s exposure risk (for example, longer stays, outbreak-setting work, or limited ability to adhere to food and water precautions). CDC’s guidance references CVD 103-HgR (Vaxchora) for eligible travelers going to areas of active toxigenic Vibrio cholerae O1 transmission.
What to watch next
WHO indicates that starting in July, the cholera epidemiological update will be included on a monthly basis in the Weekly Epidemiological Record (WER), which should make it easier to track whether the renewed rise continues or eases.
Sources
- WHO (30 June 2026): Multi-country outbreak of cholera — Epidemiological update #38
- CDC Travelers’ Health: Cholera information for health care professionals (travel guidance)
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