Journal
VACCINE
Volume 32, Issue 5, Pages 598-605Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.vaccine.2013.11.074
Keywords
Diphtheria-tetanus-pertussis vaccine; Pentavalent vaccine; Measles vaccine; Yellow fever vaccine; Child mortality
Categories
Funding
- European Research Council [ERC-2009-StG-243149]
- DANIDA [104.Dan.8-920]
- European Union FP7 [Health-F3-2011-261375]
- Danish Council of Independent Research [09-066317]
- Danish National Research Foundation via CVIVA [DNRF108]
- Novo Nordisk Foundation
- DANIDA
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Background: Studies from low-income countries indicate that co-administration of inactivated diphtheria-tetanus-pertussis (DTP) vaccine and live attenuated measles vaccine (MV) is associated with increased mortality compared with receiving MV only. Pentavalent (DTP-H. Influenza type B-Hepatitis B) vaccine is replacing DTP in many low-income countries and yellow fever vaccine (YF) has been introduced to be given together with MV. Pentavalent and YF vaccines were introduced in Guinea-Bissau in 2008. We investigated whether co-administration of pentavalent vaccine with MV and yellow fever vaccine has similar negative effects. Methods: In 2007-2011, we conducted a randomised placebo-controlled trial of vitamin A at routine vaccination contacts among children aged 6-23 months in urban and rural Guinea-Bissau. In the present study, we included 2331 children randomised to placebo who received live vaccines only (MV or MV+YF) or a combination of live and inactivated vaccines (MV+ DTP or MV+YF+ pentavalent). Mortality was compared in Cox proportional hazards models stratified for urban/rural enrolment adjusted for age and unevenly distributed baseline factors. Results: While DTP was still used 685 children received MV only and 358 MV + DTP; following the change in programme, 940 received MV+YF only and 348 MV+YF+ pentavalent. During 6 months of follow-up, the adjusted mortality rate ratio (MRR) for co-administered live and inactivated vaccines compared with live vaccines only was 3.24(1.20-8.73). For MV+YF+ pentavalent compared with MV+YF only, the adjusted MRR was 7.73 (1.79-33.4). Conclusion: In line with previous studies of DTP, the present results indicate that pentavalent vaccine co-administered with MV and YF is associated with increased mortality. (C) 2013 Elsevier Ltd. All rights reserved.
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