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Background Since COVID-19 vaccines became broadly available to the adult population, sharp divergences in uptake have emerged along partisan lines. Researchers have indicated a polarized social media presence contributing to the spread of mis- or disinformation as being responsible for these growing partisan gaps in uptake. Objective The major aim of this study was to investigate the role of influential actors in the context of the community structures and discourse related to COVID-19 vaccine conversations on Twitter that emerged prior to the vaccine rollout to the general population and discuss implications for vaccine promotion and policy. Methods We collected tweets on COVID-19 between July 1, 2020, and July 31, 2020, a time when attitudes toward the vaccines were forming but before the vaccines were widely available to the public. Using network analysis, we identified different naturally emerging Twitter communities based on their internal information sharing. A PageRank algorithm was used to quantitively measure the level of “influentialness” of Twitter accounts and identifying the “influencers,” followed by coding them into different actor categories. Inductive coding was conducted to describe discourses shared in each of the 7 communities. Results Twitter vaccine conversations were highly polarized, with different actors occupying separate “clusters.” The antivaccine cluster was the most densely connected group. Among the 100 most influential actors, medical experts were outnumbered both by partisan actors and by activist vaccine skeptics or conspiracy theorists. Scientists and medical actors were largely absent from the conservative network, and antivaccine sentiment was especially salient among actors on the political right. Conversations related to COVID-19 vaccines were highly polarized along partisan lines, with “trust” in vaccines being manipulated to the political advantage of partisan actors. Conclusions These findings are informative for designing improved vaccine information communication strategies to be delivered on social media especially by incorporating influential actors. Although polarization and echo chamber effect are not new in political conversations in social media, it was concerning to observe these in health conversations on COVID-19 vaccines during the vaccine development process.

Water has multiple values across and within cultures—transforming it from basic substance to a vehicle of cultural identity. Water scarcity can be imposed by hydrological or by social exclusion; each reinforces the other. Yet, even under scarcity, hierarchies are not immutable. People use myriad tools to increase their share of water, including, at times, the expenditure of more water. In water‐scarce informal settlements and tenements in Delhi, India, people's conspicuous use of water not only increases their social status and economic power but also generates additional access to water. This article argues that broader transformations of urban Indian culture, such as its increased commitment to middle classness, are demonstrated through the conspicuous consumption of water as a form of economic agency. Economic anthropology's theories of consumption are valuable frameworks to challenge the way water expenditures are modeled and hierarchies are upheld.

Hydrological systems are reflective of the social systems from which they spring. A close examination of the water narratives in a Central Delhi slum reveals that these are imbued with language of developmental struggle and social injustice. This brings clear voice to otherwise tacit, abstract flows ranging from the movement of women, to the circulation of money, and distribution of water, illustrating the delineation and control of the borders and categories over which things flow. In the slum, residents mark the success of their lives, and their measure of the future, by the passing of time in waiting for water. Some residents are believed to live in a state of financial, temporal, and hydrological affluence, while others identify the flows in their lives as stagnant. These abstractions are manifested in stories of daily water struggles, reflecting identities and worldviews that shed light on perceptions of development that are otherwise difficult to express. ARTICLE HISTORY

This case study demonstrates how water scientists can shift standard methods for water sampling to include marginalized communities as partners in ethical research. This case argues that water inequities are magnified when participation in scientific inquiry limits the participation of certain groups of people. It used hydrogen sulfide (H2S) testing as part of a larger project tracking water purity practice patterns, responses, and research recommendations of the hydro-socially marginalized people—the people who face not only physical, but also political barriers to water. The methodological innovation draws from engaged ethnography to enable Delhi’s water-poor to sample their own water. In doing so, community members become active partners who can better direct scientific inquiry. Their participation as active partners further empowers them as water stakeholders. It reveals how everyday small-scale cooperative projects became catalysts to inclusive governance.