Recent outbreaks of measles cases in the United States have generated concern regarding the developing trend of vaccine hesitancy. While previous research has examined the pro- and anti-vaccination messages that information seekers may produce when searching online, research has not specifically examined how individuals precisely access, search, and evaluate online vaccination information. This qualitative study used semi-structured interviews with 20 parents who chose not to vaccinate their children to examine how parents search online to make decisions regarding vaccinations. Relying primarily on Google as a search engine, parents searched using negative phrases and questions, often demonstrating a confirmation bias throughout the search process. Three themes emerged within evaluation of sources: confirmation seekers, exhaustive seekers, and casual seekers. Evaluation and validation processes varied for each group. Suggestions for the construction of online vaccination messages are discussed.

美国最近爆发的麻疹病例引起了人们对疫苗犹豫性发展趋势的关注。尽管先前的研究已经检查了信息搜索者在网上搜索时可能会产生的预防接种信息，但研究还没有具体研究个人如何精确地访问，搜索和评估在线疫苗接种信息。这项定性研究对20位选择不给孩子接种疫苗的父母进行了半结构化访谈，以调查父母如何在线搜索以做出有关疫苗接种的决定。父母主要依靠Google作为搜索引擎，他们使用否定性短语和疑问词进行搜索，通常在整个搜索过程中都显示出确认偏见。在资源评估中出现了三个主题：确认搜寻者，详尽的搜寻者，和散客。每个小组的评估和确认过程各不相同。讨论了有关构建在线疫苗接种消息的建议。