Synthetic livestock vaccines as risky interference with nature? Lay and expert arguments and understandings of “naturalness”

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The article describes how the idea of “naturalness” was used by three different groups in arguments over the risk of livestock vaccines developed in synthetic biology. Based on interviews with two groups of scientific experts and focus groups with lay people in five European countries, and using Toulmin’s argument analysis as the analytical tool, the article maps and compares the different ways in which “naturalness” was used as a warrant. Several notions of “naturalness” are involved in lay people’s reasoning and several lay people’s understandings of risk relied on their perceptions of the “unnaturalness” of the synthetic vaccines. The notion of “naturalness” was used less by synthetic biology experts and not at all by vaccine experts. Lay people see the vaccine as less natural than other vaccines and therefore as a greater risk. In contrast, synthetic biology experts understand synthetic biology as natural, and relate naturalness, unpredictability and risk.
Original languageEnglish
JournalPublic Understanding of Science
Issue number3
Pages (from-to)289-305
Number of pages17
Publication statusPublished - 2020

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