["The Milbank Quarterly, EarlyView. ", "\n\n\n\nPolicy Points\n\nNegative vicarious health care experiences circulating within communities can significantly erode systemic trust, while positive experiences can help rebuild it.\nHealth systems should actively monitor the narratives circulating within distinct community networks, treating patterns of negative shared experiences as early signals of eroding institutional trust that warrant a proactive organizational response.\nInvesting in the quality of patient–provider relationships could be a concrete lever for institutional trust resilience: strong provider relationships buffer individuals—including those in historically marginalized communities—against the corrosive effects of negative systemic narratives circulating in their networks.\nHealth systems should invest in creating structured opportunities for patients to share their positive care experiences, ensuring that these voices reach community networks where trust has been hardest to build and where authentic accounts of respectful, equitable care are currently underrepresented.\n\n\nContext\nTrust in the US health care system has declined substantially in recent years, threatening patient engagement, care outcomes, and health policy effectiveness. While prior research confirms that direct personal experiences with providers shape trust, questions remain about the influence of vicarious experiences—the health care stories shared by family members, friends, and community networks. This gap is particularly consequential in the United States, where structural inequalities have created distinct collective memories and expectations that circulate within racial and ethnic communities. This study addresses this gap by examining how the emotional valence (positive or negative) and racial identity of the narrators influence trust in the US health care system, with attention to variation by respondents’ race and baseline trust in their own provider.\n\n\nMethods\nWe conducted a 2×2 between‐subjects online survey experiment with 1,042 US adults. The sample was demographically representative by age, education, and gender, and evenly divided between non‐Hispanic White and non‐Hispanic Black participants. Respondents were randomly assigned to eight brief vignettes that varied in two dimensions: (1) emotional valence (predominantly positive vs. predominantly negative) and (2) narrators’ racial identity (majority in‐group vs. majority out‐group).\n\n\nFindings\nWe find that vicarious experiences significantly affect trust in the US health care system—but not uniformly. Non‐Hispanic White participants were not affected by in‐group experiences and responded to out‐group accounts, while the contrary held for non‐Hispanic Blacks. Trust in one's own doctor moderated these effects: strong patient–provider relationships buffered individuals from the impact of systemic stories, whereas low provider trust heightened susceptibility to narrative influence.\n\n\nConclusions\nThese findings underscore the role of collective narratives in shaping systemic trust and highlight new avenues for its strengthening among diverse populations.\n\n"]