“Before 2018, it was very hard to track the settlements that were missed on a daily basis. Another pressing issue was that accessibility to a settlement could change in a matter of days, depending on the security condition and so we always had to adjust the micro plan for our interventions. This made it very difficult to follow up on missed settlements and sometimes, some settlements with eligible children would be missed in three consecutive campaigns. This posed a serious threat to the eradication of polio in Borno state. The MISTA tool was a game-changer because it helped us to know the number of settlements missed on a daily basis, so that they can be visited either during the campaign or scheduled for the next campaign”