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Abstract On April 13, 2021, the CDC announced that the administration of Johnson and Johnson’s COVID-19 vaccine would be paused due to a rare blood clotting side effect in ~ 0.0001% of people given the vaccine. Most people who are hesitant to get a COVID-19 vaccine list potential side effects as their main concern (PEW, 2021); thus, it is likely that this announcement increased vaccine hesitancy among the American public. Two days after the CDC’s announcement, we administered a survey to a group of 2,046 Americans to assess their changes in attitudes toward COVID-19 vaccines. The aim of this study was to investigate whether viewing icon arrays of side effect risk would prevent increases in COVID-19 vaccine hesitancy due to the announcement. We found that using icon arrays to illustrate the small chance of experiencing the blood clotting side effect significantly prevented increases in aversion toward the Johnson and Johnson vaccine as well as all other COVID-19 vaccines. 

There is increasing interest in the role that ethics plays in UX practice, however current guidance is largely driven by formalized frameworks and does not adequately describe "on the ground" practitioner conversations regarding ethics. In this late-breaking work, we identified and described conversations about a specific ethical phenomenon on Twitter using the hashtag #darkpatterns. We then determined the authors of these tweets and analyzed the types of artifacts or links they shared. We found that UX practitioners were most likely to share tweets with this hashtag, and that a majority of tweets either mentioned an artifact or "shames" an organization that engages in manipulative UX practices. We identify implications for building an enhanced understanding of pragmatist ethics from a practitioner perspective.