Routine childhood vaccination programme coverage, El Salvador, 2011—In search of timeliness

Suarez-Castaneda, Eduardo; Pezzoli, Lorenzo; Elas, Miguel; Baltrons, Rafael; Crespin-Elías, Elner Osmin; Pleitez, Oscar A. Rivera; Campos, María Isabel Quintanilla de; Danovaro-Holliday, M. Carolina

doi:10.1016/j.vaccine.2013.11.072

Cited by 34 publications

(39 citation statements)

References 28 publications

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“…In this study, the proportion of children receiving DTaP doses on time decreased as the schedule progressed, consistent with previous studies [12,15,26,27]. Because this vaccine requires a minimum interval of four weeks between the first three doses, and six months between the third and fourth dose, children late for those first doses will remain late for subsequent doses, and may be more likely to not receive the fourth dose by the age of 24 months, even with adequate time for catch-up [28].…”

Section: Discussionsupporting

confidence: 92%

Timeliness of childhood vaccination in the Federated States of Micronesia

Tippins

Leidner

Meghani

et al. 2017

Vaccine

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Background: Vaccination coverage is typically measured as the proportion of individuals who have received recommended vaccine doses by the date of assessment. This approach does not provide information about receipt of vaccines by the recommended age, which is critical for ensuring optimal protection from vaccine-preventable diseases (VPDs). Objective: To assess vaccination timeliness in the Federated States of Micronesia (FSM), and the projected impact of suboptimal vaccination in the event of an outbreak. Methods: Timeliness of the 4th dose of diphtheria, tetanus, and acellular pertussis vaccine (DTaP) and 1st dose of measles, mumps, and rubella vaccine (MMR) among children 24–35 months was assessed in FSM. Both doses are defined as on time if administered from 361 through 395 days in age. Timeliness was calculated by one-way frequency analysis, and dose delays, measured in months after recommended age, were described using inverse Kaplan-Meier analysis. A time-series susceptible-exposed-infected-recov ery (TSEIR) model simulated measles outbreaks in populations with on time and late vaccination. Results: Total coverage for the 4th dose of DTaP ranged from 36.6% to 98.8%, and for the 1st dose of MMR ranged from 80.9% to 100.0% across FSM states. On time coverage for the 4th dose of DTaP ranged from 3.2% to 52.3%, and for the 1st dose of MMR ranged from 21.1% to 66.9%. Maximum and median dose delays beyond the recommended age varied by state. TSEIR models predicted 10.8–13.7% increases in measles cases during an outbreak based on these delays. Conclusions: In each of the FSM states, a substantial proportion of children received DTaP and MMR doses outside the recommended timeframe. Children who receive vaccinations later than recommended remain susceptible to VPDs during the period they remain unvaccinated, which may have a substantial impact on health systems during an outbreak. Immunization programs should consider vaccination timeliness in addition to coverage as a measure of susceptibility to VPDs in young children.

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Section: Discussionsupporting

confidence: 92%

Timeliness of childhood vaccination in the Federated States of Micronesia

Tippins

Leidner

Meghani

et al. 2017

Vaccine

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“…Concerning mothers' attitudes toward vaccination, the proportion of mother's that showed positive attitudes toward vaccinations was high compared with other studies. 6,[9][10][11]13 This finding could be explained by the presence of awareness programs about vaccines safety as part of the National Vaccination Program.…”

Section: Discussionmentioning

confidence: 99%

“…5 Although they have huge benefit, a proportion of people still do not use vaccinations effectively in terms of either not vaccinating at all, or not completing their vaccination programs. 2,[6][7][8] Characterizing reasons for non-vaccination is a key in order to increase coverage rates and implement interventions for control and elimination of vaccine preventable diseases. In this study, we used community-based survey of mothers about vaccination status, knowledge, attitudes, and practice of vaccination.…”

Section: Introductionmentioning

confidence: 99%

Public awareness regarding children vaccination in Jordan

Masadeh¹,

Alzoubi²,

Al‐Azzam³

et al. 2014

Human Vaccines & Immunotherapeutics

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“…It is worth noting that the timeliness of vaccination is not usually reported in the official vaccine coverage statistics 25 . Reported coverage may mask substantial delays in vaccination and neglect the timeliness of vaccination 26 .…”

Section: Introductionmentioning

confidence: 99%

Timeliness and completeness of measles vaccination among children in rural areas of Guangxi, China: A stratified three-stage cluster survey

Tang

Geater

McNeil

et al. 2017

Journal of Epidemiology

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BackgroundLarge-scale outbreaks of measles occurred in 2013 and 2014 in rural Guangxi, a region in Southwest China with high coverage for measles-containing vaccine (MCV). This study aimed to estimate the timely vaccination coverage, the timely-and-complete vaccination coverage, and the median delay period for MCV among children aged 18–54 months in rural Guangxi.MethodsBased on quartiles of measles incidence during 2011–2013, a stratified three-stage cluster survey was conducted from June through August 2015. Using weighted estimation and finite population correction, vaccination coverage and 95% confidence intervals (CIs) were calculated. Weighted Kaplan–Meier analyses were used to estimate the median delay periods for the first (MCV1) and second (MCV2) doses of the vaccine.ResultsA total of 1216 children were surveyed. The timely vaccination coverage rate was 58.4% (95% CI, 54.9%–62.0%) for MCV1, and 76.9% (95% CI, 73.6%–80.0%) for MCV2. The timely-and-complete vaccination coverage rate was 47.4% (95% CI, 44.0%–51.0%). The median delay period was 32 (95% CI, 27–38) days for MCV1, and 159 (95% CI, 118–195) days for MCV2.ConclusionsThe timeliness and completeness of measles vaccination was low, and the median delay period was long among children in rural Guangxi. Incorporating the timeliness and completeness into official routine vaccination coverage statistics may help appraise the coverage of vaccination in China.

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Routine childhood vaccination programme coverage, El Salvador, 2011—In search of timeliness

Cited by 34 publications

References 28 publications

Timeliness of childhood vaccination in the Federated States of Micronesia

Timeliness of childhood vaccination in the Federated States of Micronesia

Public awareness regarding children vaccination in Jordan

Timeliness and completeness of measles vaccination among children in rural areas of Guangxi, China: A stratified three-stage cluster survey

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