Quantifying the success of measles vaccination campaigns in the Rohingya refugee camps.
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ABSTRACT:
SUBMITTER: Chin T
PROVIDER: S-EPMC7343595 | biostudies-literature |
REPOSITORIES: biostudies-literature
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Project description:Background: Rohingya girls living in the refugee camps in Bangladesh are disproportionately vulnerable to child marriages and teenage pregnancies. This study examines the factors affecting child marriage and contraceptive use among Rohingya girls who have experienced child marriages. Methods: We collected and analysed quantitative and qualitative data from adolescent Rohingya girls (age 10-19 years) who experienced child marriages. The quantitative data (n=96) came from a cross-sectional survey, and the qualitative data (n=18) from in-depth interviews conducted in the world's largest refugee camp located in Cox's Bazar, Bangladesh. We also interviewed service providers (n=9) of reproductive healthcare services to gain their perspectives regarding contraceptive use among these young girls. We used descriptive statistics to characterise the girls' demographic profiles, ages at their first marriages, and contraceptive use. Thematic analysis was used for the qualitative data to identify key factors influencing child marriage and contraceptive use among these girls. Findings: On average, the adolescent female participants had been 15.7 years old when they were first married. Over 80% had given birth during the two years before the survey or were pregnant during time of the data collection. The main factors that influenced child marriage were found to be perceptions regarding the physical and mental maturity for marriage, social norms, insecurity, family honour, preferences for younger brides and the relaxed enforcement of the minimum legal age for marriage. A third (34%) of the girls said they were using contraceptives on the week when the study was conducted. The desire for children, religious beliefs, misapprehension about contraception and long waiting periods in facility-based health services and current service provision were the main factors influencing contraceptive use. Depo Provera injections and pills were the dominant methods of contraception. Contraceptive use during the period between marriage and the first childbirth is rare. Interpretation: Girl child marriage is common in Rohingya camps. Contraceptive use is rare among newly married girls before they give birth for the first time. The involvement of female and male Rohingya volunteers for outreach services can be catalytic in promoting contraceptive use. Funding: La Trobe Asia, La Trobe University, Melbourne, Australia. Bengali translation of the abstract in Appendix 1.
| S-EPMC8356092 | biostudies-literature
Project description:BackgroundFollowing an influx of an estimated 742,000 Rohingya refugees in Bangladesh, Médecins sans Frontières (MSF) established an active indicator-based Community Based Surveillance (CBS) in 13 sub-camps in Cox's Bazar in August 2017. Its objective was to detect epidemic prone diseases early for rapid response. We describe the surveillance, alert and response in place from epidemiological week 20 (12 May 2019) until 44 (2 November 2019).MethodsSuspected cases were identified through passive health facility surveillance and active indicator-based CBS. CBS-teams conducted active case finding for suspected cases of acute watery diarrhea (AWD), acute jaundice syndrome (AJS), acute flaccid paralysis (AFP), dengue, diphtheria, measles and meningitis. We evaluate the following surveillance system attributes: usefulness, Positive Predictive Value (PPV), timeliness, simplicity, flexibility, acceptability, representativeness and stability.ResultsBetween epidemiological weeks 20 and 44, an average of 97,340 households were included in the CBS per surveillance cycle. Household coverage reached over 85%. Twenty-one RDT positive cholera cases and two clusters of AWD were identified by the CBS and health facility surveillance that triggered the response mechanism within 12 hours. The PPV of the CBS varied per disease between 41.7%-100%. The CBS required 354 full-time staff in 10 different roles. The CBS was sufficiently flexible to integrate dengue surveillance. The CBS was representative of the population in the catchment area due to its exhaustive character and high household coverage. All households consented to CBS participation, showing acceptability.DiscussionThe CBS allowed for timely response but was resource intensive. Disease trends identified by the health facility surveillance and suspected diseases trends identified by CBS were similar, which might indicate limited additional value of the CBS in a dense and stable setting such as Cox's Bazar. Instead, a passive community-event-based surveillance mechanism combined with health facility-based surveillance could be more appropriate.
| S-EPMC7757896 | biostudies-literature
Project description:Early detection of pediatric eye problems can prevent future vision loss. This study was to estimate the prevalence of common eye problems among infants born in a resource-constrained emergency setting with a broader aim to prevent future vision loss or blindness among them through early detection and referral. We conducted a cross-sectional survey among 670 infants (0-59 days old) born in Rohingya refugee camps in Bangladesh between March and June of 2019. The most common eye problem found was watering from the eye and accumulation of discharge by which 14.8% of the children were suffering (95% CI: 12.2-17.7). More than 5% of the infants had visual inattention (95% CI: 3.5-7.0), and 4% had redness in their eyes (95% CI: 2.7-5.8). Only 1.9% of infants (95% CI: 1-3.3) had whitish or brown eyeballs, and 1.8% of children might have whitish pupillary reflex (95% CI: 0.9-3.1). None of the eye problems was associated with the gender of the infants. The prevalent eye problems demand eye care set up for the screening of eye problems in the camps with proper referral and availability of referral centres with higher service in the districts.
| S-EPMC7157546 | biostudies-literature
Project description:BACKGROUND/OBJECTIVES:This study examined the best practices with regard to infant and young child feeding in emergency (IYCF-E) program. This was done by observing a breastfeeding support scenario through wet nursing in Rohingya refugee camps in Cox's Bazar, Bangladesh. METHODS:Information on demographics, IYCF-E knowledge, wet nursing support, type of constraints faced, and possible ways to overcome such constraints was collected through face-to-face interviews with 24 conveniently selected wet nurses. Linear regression was used to analyze the associations. RESULTS:Mean age of wet nurses was 21.6 years; 16.67% had adequate knowledge about IYCF-E; and 29.17% had prior knowledge about wet nursing. Mean age of supported infants was 1.29 months, and 58.33% had a familial relationship with the wet nurses. Duration of breastfeeding support was significantly associated with the wet nurse's age, age of the wet nurses' youngest children, familial relationship with infants, knowledge about IYCF-E, and follow-ups from community nutrition workers (Ps <0.05). The status of facing problems (58.33%) was negatively correlated with duration of wet nursing, although this association was not statistically significant. The most extensively reported problems were as follows: misunderstandings with the infant's family (85.71%), family workload and time limitations (21.43%), household distance (42.86%), and family members' poor compliance (21.43%). Counseling from community nutrition workers (64.29%) and mediation by community leaders (57.14%) played key roles in mitigating such problems. Self-satisfaction (37.50%), counseling (62.50%), and religious inspiration (58.33%) were key motivators behind dedicated breastfeeding support. CONCLUSION:Wet nursing in the Rohingya refugee camps in Cox's Bazaar, Bangladesh, was associated with several factors involving both supply and demand. The present findings may help design better IYCF-E programs in similar context.
| S-EPMC6774527 | biostudies-literature
Project description:Foot-and-mouth disease outbreaks in non-endemic countries can lead to large economic costs and livestock losses but the use of vaccination has been contentious, partly due to uncertainty about emergency FMD vaccination. Value of information methods can be applied to disease outbreak problems such as FMD in order to investigate the performance improvement from resolving uncertainties. Here we calculate the expected value of resolving uncertainty about vaccine efficacy, time delay to immunity after vaccination and daily vaccination capacity for a hypothetical FMD outbreak in the UK. If it were possible to resolve all uncertainty prior to the introduction of control, we could expect savings of £55 million in outbreak cost, 221,900 livestock culled and 4.3 days of outbreak duration. All vaccination strategies were found to be preferable to a culling only strategy. However, the optimal vaccination radius was found to be highly dependent upon vaccination capacity for all management objectives. We calculate that by resolving the uncertainty surrounding vaccination capacity we would expect to return over 85% of the above savings, regardless of management objective. It may be possible to resolve uncertainty about daily vaccination capacity before an outbreak, and this would enable decision makers to select the optimal control action via careful contingency planning.
| S-EPMC5312803 | biostudies-literature
Project description:BackgroundThis study characterizes the historical relationship between coverage of measles containing vaccines (MCV) and mortality in children under 5 years, with a view toward ongoing global efforts to reduce child mortality.Methodology/principal findingsUsing country-level, longitudinal panel data, from 44 countries over the period 1960-2005, we analyzed the relationship between MCV coverage and measles mortality with (1) logistic regressions for no measles deaths in a country-year, and (2) linear regressions for the logarithm of the measles death rate. All regressions allowed a flexible, non-linear relationship between coverage and mortality. Covariates included birth rate, death rates from other causes, percent living in urban areas, population density, per-capita GDP, use of the two-dose MCV, year, and mortality coding system. Regressions used lagged covariates, country fixed effects, and robust standard errors clustered by country. The likelihood of no measles deaths increased nonlinearly with higher MCV coverage (ORs: 13.8 [1.6-122.7] for 80-89% to 40.7 [3.2-517.6] for ≥95%), compared to pre-vaccination risk levels. Measles death rates declined nonlinearly with higher MCV coverage, with benefits accruing more slowly above 90% coverage. Compared to no coverage, predicted average reductions in death rates were -79% at 70% coverage, -93% at 90%, and -95% at 95%.Conclusions/significance40 years of experience with MCV vaccination suggests that extremely high levels of vaccination coverage are needed to produce sharp reductions in measles deaths. Achieving sustainable benefits likely requires a combination of extended vaccine programs and supplementary vaccine efforts.
| S-EPMC2973966 | biostudies-literature
Project description:BackgroundRoutine vaccination supplemented by planned campaigns occurring at 2-5 y intervals is the core of current measles control and elimination efforts. Yet, large, unexpected outbreaks still occur, even when control measures appear effective. Supplementing these activities with mass vaccination campaigns triggered when low levels of measles immunity are observed in a sample of the population (i.e., serosurveys) or incident measles cases occur may provide a way to limit the size of outbreaks.Methods and findingsMeasles incidence was simulated using stochastic age-structured epidemic models in settings conducive to high or low measles incidence, roughly reflecting demographic contexts and measles vaccination coverage of four heterogeneous countries: Nepal, Niger, Yemen, and Zambia. Uncertainty in underlying vaccination rates was modeled. Scenarios with case- or serosurvey-triggered campaigns reaching 20% of the susceptible population were compared to scenarios without triggered campaigns. The best performing of the tested case-triggered campaigns prevent an average of 28,613 (95% CI 25,722-31,505) cases over 15 y in our highest incidence setting and 599 (95% CI 464-735) cases in the lowest incidence setting. Serosurvey-triggered campaigns can prevent 89,173 (95% CI, 86,768-91,577) and 744 (612-876) cases, respectively, but are triggered yearly in high-incidence settings. Triggered campaigns reduce the highest cumulative incidence seen in simulations by up to 80%. While the scenarios considered in this strategic modeling exercise are reflective of real populations, the exact quantitative interpretation of the results is limited by the simplifications in country structure, vaccination policy, and surveillance system performance. Careful investigation into the cost-effectiveness in different contexts would be essential before moving forward with implementation.ConclusionsSerologically triggered campaigns could help prevent severe epidemics in the face of epidemiological and vaccination uncertainty. Hence, small-scale serology may serve as the basis for effective adaptive public health strategies, although, in high-incidence settings, case-triggered approaches are likely more efficient.
| S-EPMC5058560 | biostudies-literature
Project description:BACKGROUND:Measles continues to circulate in the Democratic Republic of Congo, and the country suffered from several important outbreaks over the last 5 years. Despite a large outbreak starting in the former province of Katanga in 2010 and the resulting immunization activities, another outbreak occurred in 2015 in this same region. We conducted measles seroprevalence surveys in four health zones (HZ) in the former Katanga Province in order to assess the immunity against measles in children 6 months to 14 years after the 2015 outbreak. METHODS:We conducted multi-stage cluster surveys stratified by age group in four HZs, Kayamba, Malemba-Nkulu, Fungurume, and Manono. The age groups were 6-11 months, 12-59 months, and 5-14 years in Kayamba and Malemba-Nkulu, 6-59 months and 5-14 years in Manono and Fungurume. The serological status was measured on dried capillary blood spots collected systematically along with vaccination status (including routine Extended Program of Immunization (EPI), and supplementary immunization activities (SIAs)) and previous self-reported history of suspected measles. RESULTS:Overall seroprevalence against measles was 82.7% in Kayamba, 97.6% in Malemba-Nkulu, 83.2% in Manono, and 74.4% in Fungurume, and it increased with age in all HZs. It was 70.7 and 93.8% in children 12-59 months in Kayamba and Malemba-Nkulu, and 49.8 and 64.7% in children 6-59 months in Fungurume and Manono. The EPI coverage was low but varied across HZ. The accumulation of any type of vaccination against measles resulted in an overall vaccine coverage (VC) of at least 85% in children 12-59 months in Kayamba and Malemba-Nkulu, 86.1 and 74.8% in children 6-59 months in Fungurume and Manono. Previous measles infection in 2015-early 2016 was more frequently reported in children aged 12-59 months or 6-59 months (depending on the HZ). CONCLUSION:The measured seroprevalence was consistent with the events that occurred in these HZs over the past few years. Measles seroprevalence might prove a valuable source of information to help adjust the timing of future SIAs and prioritizing support to the EPI in this region as long as the VC does not reach a level high enough to efficiently prevent epidemic flare-ups.
| S-EPMC6704676 | biostudies-other
Project description:IntroductionAll six WHO regions currently have goals for measles elimination by 2020. Measles vaccination is delivered via routine immunization programmes, which in most sub-Saharan African countries reach children around 9months of age, and supplementary immunization activities (SIAs), which target a wider age range at multi-annual intervals. In the absence of endemic measles circulation, the proportion of individuals susceptible to measles will gradually increase through accumulation of new unvaccinated individuals in each birth cohort, increasing the risk of an epidemic. The impact of SIAs and the financial investment they require, depend on coverage and target age range.Materials and methodsWe evaluated the impact of target population age range for periodic SIAs, evaluating outcomes for two different levels of coverage, using a demographic and epidemiological model adapted to reflect populations in 4 sub-Saharan African countries.ResultsWe found that a single SIA can maintain elimination over short time-scales, even with low routine coverage. However, maintaining elimination for more than a few years is difficult, even with large (high coverage/wide age range) recurrent SIAs, due to the build-up of susceptible individuals. Across the demographic and vaccination contexts investigated, expanding SIAs to target individuals over 10years did not significantly reduce outbreak risk.ConclusionsElimination was not maintained in the contexts we evaluated without a second opportunity for vaccination. In the absence of an expanded routine program, SIAs provide a powerful option for providing this second dose. We show that a single high coverage SIA can deliver most key benefits in terms of maintaining elimination, with follow-up campaigns potentially requiring smaller investments. This makes post-campaign evaluation of coverage increasingly relevant to correctly assess future outbreak risk.
| S-EPMC5341736 | biostudies-literature
Project description:BackgroundMetabolic syndrome (MetS) is one of the main reasons for elevated cardiovascular morbidity and mortality worldwide. Obese and overweight individuals are at high risk of developing these chronic diseases. The aim of this study was to characterize and establish sex-adjusted prevalence of metabolic syndrome and its components.MethodsA cross-sectional study was conducted in 2015, 689 (329 men and 360 women) aged 18-65 years from three refugee camps in the West Bank. International Diabetes Federation and modified National Cholesterol Education Program-Third Adult Treatment Panel definitions were used to identify MetS.ResultsThe overall prevalence of obesity and overweight was high, 63.1%; Obesity (42 and 29.2% in women men; respectively and overweight 25.8 and 28.9% in women and men; respectively. The prevalence of MetS among obese and overweight was significantly higher (69.4%) according to IDF than NCEP definition (52%) (p?<?0.002) with no significant differences between men and women using both definitions; (IDF; 71.8% men vs. 67.6% women, and (NCEP/ATP III; 51.9% men vs. 52.2% women). The prevalence of MetS increased significantly with increasing obesity and age when NCEP criterion is applied but not IDF. The prevalence of individual MetS components was: high waist circumference 81.3% according to IDF and 56.5% according to NCEP, elevated FBS 65.3% according to IDF and 56% according to NCEP, elevated blood pressure 48%, decreased HDL 65.8%, and elevated triglycerides 31.7%. Based on gender differences, waist circumferences were significantly higher in women according to both criteria and only elevated FBS was higher in women according to IDF criteria. Physical activity was inversely associated with MetS prevalence according to NCEP but not IDF. No significant associations were found with gender, smoking, TV watching, and family history of hypertension or diabetes mellitus.ConclusionIn this study, irrespective of the definition used, metabolic syndrome is highly prevalent in obese and overweight Palestinian adults with no gender-based differences. The contribution of the metabolic components to the metabolic syndrome is different in men and women. With the increase of age and obesity, the clustering of metabolic syndrome components increased remarkably. More attention through health care providers should, therefore, be given to the adult population at risk to reduce adulthood obesity and subsequent cardiovascular diseases.
| S-EPMC5907715 | biostudies-literature