The campaigns vaccinated 936,618 children during the first round, 997,941 during the second and 1,025,806 during the third.
The initiative focused on border communities, refugee camps, and other vulnerable areas where frequent cross-border movement increases the risk of disease transmission.
The development marks another milestone for the West African nation, which was certified free of wild poliovirus in 2019 by the Africa Regional Commission for the Certification of Poliomyelitis Eradication.
Trained health workers will conduct house-to-house visits and set up vaccination points at designated community locations to maximise coverage.
A total of 1,709 health workers participate in the effort, including vaccinators, registrars, social mobilizers, logistics personnel, health promotion staff, and data managers.