Global Citizen is saddened to learn that Nigeria has suffered a polio outbreak paralyzing two children in the northeast region of Borno. On a day we should be celebrating two years since the last case of polio in Africa, we are reminded that our efforts to combat polio must be unrelenting.

If we can't reach every child in some of the most remote, vulnerable and socially marginalized communities with a basic 13 cent vaccine then what hope do we have of achieving the SDGs, which at their core are about leaving no one behind.

This is the litmus test, the proof point, of the 2030 development agenda and we should all recommit to taking strong action.

The international community must redouble efforts to fully protect every last child from the crippling effects of polio, and prevent any more children falling casualty to this debilitating disease.

We will continue to work with our partners at the Global Polio Eradication Initiative, including the Gates Foundation, WHO, UNICEF, CDC, Rotary International, and applaud their leadership in bringing us closer to a polio-free world.