'Vaccine as a ': a metaphor gone awry on Facebook.

COVID-19 vaccine-related conspiracy narratives skyrocketed in social media in the first year of the pandemic. Science communicators have tried to debunk false information as did Vlad Mixich, a Romanian public health expert, who tried to explain on Facebook why the vaccine cannot modify the human DNA. Drawing on the literature on metaphor as a discourse phenomenon, this paper uses a discourse-led approach to metaphor analysis to identify and analyze the metaphors used by Mixich to explain how vaccines work and the mRNA technology underlying the COVID-19 vaccine. A particular metaphor is then given special attention: 'vaccine as a '. The author of the Facebook post seems to use this metaphor deliberately both to clarify vaccine-related information and to mock people susceptible to false information about the vaccine. This paper shows that while the 'cheating' metaphor simplifies abstract knowledge and allows the audience to engage with a complex topic, it also has potential to amplify vaccine-related polarization.