Diphtheria outbreak in sub-Saharan Africa
Should I be worried? · Pathogen library: diphtheria · Nigeria · Nicaragua · Chad · Guinea · Mali · Mauritania · Somalia
| Official | Media, unverified | Reported this week | |
|---|---|---|---|
| Deaths | — | 699 45 highest in the last 7 days | — |
| Confirmed cases | 86 as of 11 Oct 2026 | 31,101 as of 10 Oct 2026 | — |
| Suspected cases | 5 as of 11 Oct 2026 | 5,401,402 5,400,000 highest in the last 7 days | — |
| Hospitalised | — | 623 as of 10 Oct 2026 | — |
Diphtheria is an established, vaccine-preventable bacterial disease with efficient person-to-person respiratory spread, but the current African signal is notable because it is regional rather than a single local flare-up. In the official material retrieved in this session, WHO AFRO says the Region is facing a resurgence, with five active outbreaks currently in South Africa, Guinea, Mauritania, Niger and Nigeria, and additional vulnerable countries including Chad, Mali and Somalia. WHO’s latest regional DON, covering 2025-01-01 to 2025-11-02, counted 20,412 suspected cases and 1,252 deaths across eight African member states. What is less clear is the current 2026 country-by-country burden. The retrieved official pages did not provide a fresh regional total for 2026, and the Nigeria official page fetched here was only an index of sitreps. Unverified collected reports cite substantial ongoing activity in Nigeria, but the figures diverge sharply: Plateau State reports cluster in the hundreds, while broader Nigeria totals in media range from 12,900 suspected cases and 406 deaths to 61,930 suspected cases and 2,151 deaths. Oyo State also publicly denied confirmed cases in one collected report. What to watch next: publication of updated official Nigeria, Niger, Mauritania and Guinea totals; evidence of spread into additional countries or districts; diphtheria antitoxin availability; and whether vaccination gaps continue to drive school-age and child clusters.
Situation as of 17 Oct 2026
Official
WHO AFRO says the African Region is experiencing a resurgence of diphtheria, with five active outbreaks currently in South Africa, Guinea, Mauritania, Niger and Nigeria, and identifies several other countries as vulnerable, including Chad, Mali and Somalia. WHO’s regional DON for 2025 reported 20,412 suspected cases and 1,252 deaths across eight African member states from 2025-01-01 to 2025-11-02, noting that several countries had ongoing outbreaks since 2023. In one current national official report captured by the tracker, South Africa’s NICD week 41 report listed 43 confirmed cases nationally. Fresh official 2026 cross-country totals for Nigeria, Niger, Mauritania and Guinea were not available in the official pages retrieved in this session.
Media, unverified
Unverified collected reports describe continuing Nigerian activity at state and national level. These include Plateau State reports of 469 suspected cases and 31 deaths by late September, FCT reports of two deaths and five hospitalisations in early October, a suspected Minna outbreak with four cases and one death, and much larger conflicting Nigeria cumulative totals in different reports, ranging from 12,900 suspected cases and 406 deaths to 61,930 suspected cases and 2,151 deaths. One collected report also cites Oyo State denying confirmed cases.
Control measures
WHO AFRO says it is prioritising prevention in vulnerable member states. Retrieved reports also show continued official situational reporting in South Africa. Media and locally sourced reports from Nigeria mention response actions such as school management decisions and concern about vaccine supply, but detailed cross-country official information on 2026 vaccination campaign scope, contact tracing, antitoxin deployment or travel measures was not consistently available from the sources retrieved in this session.
Timeline
- · WHO reported that from 2025-01-01 to 2025-11-02, 20,412 suspected diphtheria cases and 1,252 deaths had been reported across eight WHO African Region member states, with several countries experiencing ongoing outbreaks since 2023.
- · Collected Nigerian media reports citing Plateau State health authorities said Plateau State had 469 suspected cases, three confirmed cases and 31 deaths.
- · A collected report citing Gwagwalada Area Council in the Federal Capital Territory said diphtheria had caused two deaths and five hospitalisations in Zuba.
- · A collected report said Oyo State Government denied confirmed diphtheria cases in the state.
- · South Africa’s NICD week 41 situational report, as captured in the tracker, listed 43 confirmed diphtheria cases nationally.
Latest reports
- · adevarul.ro · Media, unverified
The story of Victor Babeș, the first Romanian doctor nominated for the Nobel who found the cure for diseases of poverty. The state humiliated him and charged him for using the stable and horses - · opinionnigeria.com · Media, unverified
Abubakar Malami And The Northwest Regional Campaign Manifesto ( Part 3 ) - By [name] - · allafrica.com · Media, unverified
Nigeria Hunger Crisis Takes Its Toll on Caregivers # WorldFoodDay - · National Institute for Communicable Diseases (South Africa) · Official
Diphtheria situational report (week 41 of 2026) - · allafrica.com · Media, unverified
Nigeria : 93 % of Children Affected By Diphtheria Outbreaks Not Fully Vaccinated - Official - · Premium Times · Media, unverified
93% of children affected by diphtheria outbreaks not fully vaccinated – Official - · Bluesky · Social post, not counted
Oyo Denies Confirmed Diphtheria Cases, Accuses APC Campaign of Misrepresenting Health Data October 13, 2026 - LAGOS, Nigeria (Naija247news)… - · ovid.com · Media, unverified
Diphtheria outbreak in Nigeria: lessons from the... - · ncdc.gov.ng · Media, unverified
An Update of Diphtheria Outbreak in Nigeria - · afro.who.int · Media, unverified
Surtos de difteria - · pmc.ncbi.nlm.nih.gov · Media, unverified
Diphtheria outbreak in Nigeria: what we know now - PMC - NIH - · leadership.ng · Media, unverified
1 Child Dies In Niger Suspected Diphtheria Outbreak