WHO has published its weekly Yellow fever situation report for June 23. Click or tap through for the full report. The summary:
Angola: 3294 suspected cases
In Angola the total number of notified cases has increased since early 2016. As of 17 June 2016 a total of 3294 suspected cases have been reported, of which 861 are confirmed. The total number of reported deaths is 347, of which 115 were reported among confirmed cases. Suspected cases have been reported in all provinces, and confirmed cases have been reported in 16 of 18 provinces and 79 of 123 reporting districts.
Mass vaccination campaigns first began in Luanda and have now expanded to cover most of the other affected parts of Angola. Recently the campaigns have focused on border areas. Despite extensive vaccination efforts circulation of the virus persists.
Democratic Republic of the Congo: 1106 suspected cases
As of 20 June, in the Democratic Republic of The Congo (DRC), the total number of notified suspected cases is 1106, with 68 confirmed cases and 75 deaths. Cases have been reported in 22 health zones in five provinces. Of the 68 confirmed cases, 59 were imported from Angola, two are sylvatic and seven are autochthonous.
Surveillance efforts have increased and vaccination campaigns in DRC have centred on affected zones in Kinshasa and Kongo Central.
The risk of spread
Two additional countries have reported confirmed yellow fever cases imported from Angola: Kenya (two cases) and People’s Republic of China (11 cases). These cases highlight the risk of international spread through non-immunised travellers.
Six countries (Brazil, Chad, Colombia, Ghana, Peru and Uganda) are currently reporting yellow fever outbreaks or sporadic cases not linked to the Angolan outbreak.
The outbreak in Angola remains of high concern due to:
• Persistent local transmission despite the fact that nearly 11 million people have been vaccinated;
• Local transmission has been reported in 12 highly populated provinces including Luanda.
• The continued extension of the outbreak to new provinces and new districts.
• High risk of spread to neighbouring countries. As the borders are porous with substantial cross border social and economic activities, further transmission cannot be excluded. Viraemic travelling patients pose a risk for the establishment of local transmission especially in countries where adequate vectors and susceptible human populations are present;
• Risk of establishment of local transmission in other provinces where no autochthonous cases are reported;
• High index of suspicion of ongoing transmission in hard-to-reach areas like Cabinda;
• Enhanced surveillance is needed and further strengthening of surveillance is underway.