Congo was about to receive, in 2006, a certificate announcing to complete eradication of the Polio Virus. However, according to a Ministry of Health Report in May 2006, one case of poliovirus, type 1 was isolated in a laboratory in the Boma-Bungu health zone, in the province of Bas-Congo that shares a large border with Angola.
What's frustrating is that it was so close to disappearing: during two years (2003, 2005), the DRC had organized National Vaccination Days with vaccination coverage reaching 105% and 99%* each.
But it's going to be near impossible to make poliovirus disappear in a context where some communities are so isolated that medical staff cannot reach them with cold vaccines, syringes and sensitization.
*This seemingly too high coverage is due to several factors: (1) the number of children existing in the health zone is underestimated, and (2) other children may come to this health zone from neighboring health zones-->thus more children than planned are actually vaccinated