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International audience; In parallel with the COVID-19 pandemic, an infodemic—an information epidemic—challenges human populations across the planet. Often framed as an enemy to be conquered, infodemics endanger public health because inaccurate or erroneous information spreads quickly on a large scale, triggers potentially harmful behaviours, and generates stress and anxiety. Much infodemics research privileges the investigation of online information creation and circulation, as well as measures to counter erroneous information. Less examined, however, are the offline effects of an infodemic. This chapter surveys how infodemic analysts have evaluated interactions between online information and offline practice. It examines studies focusing on the harmful content of the online informational ecosystem and containment efforts, and then explores social sciences contributions, which broadly identify factors contributing to public interpretation and offline practices. We conclude with a concrete example of an anthropological study exploring the interplay of online information and offline practice during the COVID-19 pandemic.

The COVID-19 vaccine rollout in recent months offers a powerful preventive measure that may help control SARS-CoV-2 transmission. Nevertheless, long-standing public hesitation around vaccines has heightened public health concerns that vaccine coverage may not achieve desired public health impacts.This cross-sectional survey was conducted online in December 2020 among 7000 respondents (aged 18 to 65) in Belgium, France, Germany, Italy, Spain, Sweden, and Ukraine. The survey included open text boxes for fuller explanation of responses. Projected COVID-19 vaccine coverage varied and may not be sufficiently high among certain populations to achieve herd immunity. Overall, 56.9% would accept a COVID-19 vaccine, 19.0% would not, and 24.1% did not know or preferred not to say. By country, between 44% (France) and 66% (Italy) of respondents would accept a COVID-19 vaccine. Respondents expressed conditionality in open responses, voicing concerns about vaccine safety and mistrust of authorities. Public health campaigns must tackle these safety concerns.HighlightsMixed-method survey studied expected COVID vaccine uptake in 7 European countries.Projected COVID vaccine acceptance by country ranged from 44% to 66%.Explicit COVID vaccine acceptance or rejection was conditional.Study finds concerns about vaccine safety and authorities’ competence and honesty.Vaccine communications should address safety anxieties and target specific groups.