South Sudan: Weekly Integrated Disease Surveillance and Response bulletin 2026 – Reporting period: Epidemiological Week 01 29th December to 4th January 2026

Country: South Sudan Source: World Health Organization Please refer to the attached file. Key highlights ▪ In week 01 of 2026, IDSR reporting timeliness was at 69%, which was slightly lower than 74% attained in the previous week 52. The completeness of IDSR reporting was 88%, which is an improvement from the 80% achieved in the previous week. Nine of the thirteen states/administrative areas achieved reporting completeness of above the targeted 80%, while four (Abyei Administrative Area, Jonglei, Upper Nile and Western Bahar el Ghazal State) did not. Only Unity State maintained their 100% completeness of IDSR reporting. Subsequently, at the EWARN mobile sites, reporting timeliness and completeness were both at 67%. ▪ EWARS Alerts Management: A total of 66 EWARS alerts were triggered in week 01, with 48 (73%) verified. Most of the alerts generated were for Guinea worm (44%), ARI (29%), cholera (11%) and EBS (6%). 4 alerts were risk assessed and 4 required a response. Congratulations to the surveillance teams in Abyei Administrative Area, Lakes, Eastern Equatoria, Jonglei, Northern Bahr el Ghazal and Western Equatoria states who verified all their triggered alerts. ▪ Mpox Outbreak: In the week ending January 29, 2026, two new confirmed cases of Mpox were reported: one in Juba County (Jebel Lemon area) and one in Ezo County western Equatoria state, bringing the cumulative total to 40 confirmed cases since the outbreak was confirmed in February 2025. Of the 40 confirmed Mpox cases, 35 are reported in Juba, 2 in Rumbek Centre, and 1 case each in Rumbek East, Malakal, and Ezo County. ▪ Cholera outbreak: As of January 29, 2026, a cumulative total of 97, 752 cases and 1, 607 deaths (CFR: 1. 6%, target < 1%). Of which 96, 072 of the cases have fully recovered and discharged, representing 98. 3% of the total case burden. In the last 7 days (onset from 21 to 27 January 2026), 146 new cases and 7 deaths were reported by 4 counties (up from 73 new cases reported from last week). The new cases came from Duk (83), Panyijiar (30) Mayendit (26), and Mayom (7). The new deaths came from Duk (4) and Panyijiar (3) ▪ Other active Outbreaks and events: Currently, there are Anthrax, cVDPV2/Polio, measles, and Hepatitis E outbreaks in various counties. This is in addition to the protracted South Sudan and Sudan Crisis humanitarian Response.

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