PLoS Currents: Outbreaks
http://currents.plos.org/outbreaks/
(Accessed 7 February 2015)

Measles Vaccination Coverage Survey in Moba, Katanga, Democratic Republic of Congo, 2013: Need to Adapt Routine and Mass Vaccination Campaigns to Reach the Unreached
February 2, 2015 • Research
Julita Gil Cuesta, Narcisse Mukembe, Palle Valentiner-Branth, Pawel Stefanoff, Annick Lenglet
The Democratic Republic of Congo (DRC) has committed to eliminate measles by 2020. In 2013, in response to a large outbreak, Médecins Sans Frontières conducted a mass vaccination campaign (MVC) in Moba, Katanga, DRC. We estimated the measles vaccination coverage for the MVC, the Expanded Programme on Immunization routine measles vaccination (EPI) and assessed reasons for non-vaccination.
We conducted a household-based survey among caretakers of children aged 6 months-15 years in Moba from November to December 2013. We used a two-stage-cluster-sampling, where clusters were allocated proportionally to village size and households were randomly selected from each cluster. The questionnaire included demographic variables, vaccination status (card or oral history) during MVC and EPI and reasons for non-vaccination. We estimated the coverage by gender, age and the reasons for non-vaccination and calculated 95% confidence intervals (95% CI).
We recruited 4,768 children living in 1,684 households. The MVC coverage by vaccination card and oral history was 87% (95% CI 84-90) and 66% (95% CI 61-70) if documented by card. The EPI coverage was 76% (95% CI 72-81) and 3% (95% CI 1-4) respectively. The MVC coverage was significantly higher among children previously vaccinated during EPI 91% (95% CI 88-93), compared to 74% (95% CI 66-80) among those not previously vaccinated. Six percent (n=317) of children were never vaccinated. The main reason for non-vaccination was family absence 68% (95% CI 58-78).
The MVC and EPI measles coverage was insufficient to prevent the recurrence of outbreaks in Moba. Lack of EPI vaccination and lack of accessibility by road were associated with lower MVC coverage. We recommend intensified social mobilization and extended EPI and MVCs to increase the coverage of absent residents and unreached children. Routine and MVCs need to be adapted accordingly to improve coverage in hard-to-reach populations in DRC.
Conclusions
We estimated 87% coverage of the MVC in response to the measles outbreak in Moba territory. This coverage may be insufficient to prevent future outbreaks. Lack of a EPI vaccination and lack of accessibility by road were associated with lower MVC campaign coverage. Absence during the MVC and EPI vaccination were the main reasons for non-vaccination. On the basis of these conclusions, we recommend more accessible vaccination sites for each village in order to improve vaccination coverage during EPI and MVCs. We recommend improved social mobilization of the population through extended vaccination time in less accessible villages and to give notice well ahead of vaccination days. Campaign staff must emphasise children and their parents the importance of keeping the vaccination cards. EPI and MVCs need to be adapted accordingly to face these logistical and communication barriers. Hence, the vaccination of hard-to-reach children can contribute to meet the goal of measles elimination in DRC and similar settings.