The road leading to Hagadera in the Dadaab Refugee Complex is wide, straight and dusty.
Inside the camp, where tin and mud-walled houses are shielded from the wind by dry twig fences, the road narrows as it winds its way to the block E6 dispensary in the heart of the camp.
This is the first day of the round one vaccination campaign against polio in 12 high-risk counties, including Garissa.
The latest round targets children under five years, who will get the bivalent oral polio vaccine.
This morning, 29 teams, each comprising a team leader, a community health volunteer and a vaccinator, have been dispatched throughout the refugee camp.