Sangha borders Cameroon and Central African Republic, where circulating vaccine-associated poliovirus was detected in 2019.The vaccination drive in Sangha targeting more than 24 000 children was the second in 2019. A countrywide one was held six months earlier. Two campaigns are planned in 2020. The mass immunizations are in addition to routine vaccinations.Congo's last major wild polio outbreak was in 2010. The poliovirus type 1 (there are three types) epidemic infected more than 180 people and killed 85, mostly in the Atlantic port city of Pointe Noire in an outbreak found to be linked to one that was going on in neighbouring Angola. The majority of the infections and deaths were in people over 15 years.The country has stepped up polio control measures, but the rate of vaccination was still below 80% in 2019, although up from 68% the year before. Low immunization coverage and poor sanitation puts Congo at risk of circulating vaccine-derived poliovirus

Source: WHO