Kenyan volunteers track vaccine‑derived polio in remote Samburu region

In Kenya’s sparsely populated north, community health volunteers such as Eroi Lemarkat ride motorbikes to investigate reports of acute flaccid paralysis (AFP) in remote Samburu and Turkana counties. While wild poliovirus has been eliminated continent‑wide, a vaccine‑derived strain can still circulate where children are under‑immunised, especially among nomadic pastoralist communities.

Kenya’s surveillance combines laboratory testing of wastewater in Nairobi with on‑the‑ground case finding. Volunteers collect two stool samples within 14 days of paralysis onset, a tight window that Lemarkat described as “a race against time. If we arrive too late, we may lose the opportunity to confirm whether polio is responsible.” Dr Galm Glelo, the Ministry of Health’s national point person for polio surveillance, said the information gathered by volunteers enables rapid, targeted interventions.

The work is complicated by frequent cross‑border movements with Somalia. Dr Emmanuel Okunga noted that nomadic families “constantly move back and forth across these invisible international borders in search of water and pasture,” making trust‑building essential. Volunteers spend years establishing relationships with village elders and religious leaders to secure consent for sample collection, recognizing that a missed case could allow silent transmission to continue.