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PLoS One. 2019 Aug 15;14(8):e0220963. doi: 10.1371/journal.pone.0220963. eCollection 2019.

Why isn't everyone using the thermotolerant vaccine? Preferences for Newcastle disease vaccines by chicken-owning households in Tanzania.

Author information

1
Paul G. Allen School for Global Animal Health, Washington State University, Pullman, Washington, United States of America.
2
Nelson Mandela African Institution of Science and Technology (NM-AIST), Arusha, Tanzania.
3
Kenya Medical Research Institute (KEMRI), Kisian, Kenya.
4
School of Economic Sciences, Washington State University, Pullman, Washington, United States of America.
5
Department of Anthropology, Washington State University, Pullman, Washington, United States of America.

Abstract

Understanding preferences for veterinary vaccines in low and middle-income countries is important for increasing vaccination coverage against infectious diseases, especially when the consumer is responsible for choosing between similar vaccines. Over-the-counter sales of vaccines without a prescription gives decision-making power to consumers who may value vaccine traits differently from national or international experts and vaccine producers and distributers. We examine consumer preferences for La Sota and I-2 Newcastle disease vaccines in Tanzania to understand why two vaccines co-exist in the market when I-2 is considered technically superior because of its thermotolerance. Household survey and focus group results indicate consumers perceive both vaccines to be effective, use the two vaccines interchangeably when the preferred vaccine is unavailable, and base preferences more on administration style than thermotolerance. Considering the consumers' perspectives provides a way to increase vaccination coverage by targeting users with a vaccine that fits their preferences.

Conflict of interest statement

The authors have declared that no competing interests exist.

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