YouTube videos have been used to inform and misinform the public about the safety of vaccines related to health threats such as measles and COVID-19. Understanding how such videos can promote the sharing of accurate vaccine safety information is of the utmost importance if health researchers are to combat the spread of misinformation and encourage widespread uptake of vaccines. Through the lens of prospect theory, this study conducted a 2 (framing: loss v. gain) x 2 (evidence type: episodic v. thematic) x 2 (speaker expertise: expert v. non-expert) between-subject factorial experiment in which a sample of N = 400 US adults over the age of 18 recruited through MTurk were asked their intention to share vaccine safety information with others after watching a manipulated YouTube video. The results showed that loss framing was associated with perceived MMR severity which was, in turn, associated with the likelihood that participants would share MMR vaccine information with others, via any means. However, this process varied depending on the type of evidence delivered, and the expertise of the speaker. Results and limitations are discussed in the context of vaccine communication and social media.

YouTube 视频已被用来向公众通报和误导公众，了解与麻疹和 COVID-19 等健康威胁相关的疫苗的安全性。如果卫生研究人员要打击错误信息的传播并鼓励疫苗的广泛使用，了解此类视频如何促进准确疫苗安全信息的共享至关重要。通过前景理论的视角，本研究进行了 2（框架：损失与收益）x 2（证据类型：情节与主题）x 2（演讲者专业知识：专家与非专家）在通过 MTurk 招募了 N = 400 名 18 岁以上美国成年人的样本，他们被问及他们是否打算在观看被操纵的 YouTube 视频后与他人分享疫苗安全信息。结果表明，损失框架与感知的 MMR 严重程度相关，而后者又与参与者通过任何方式与他人分享 MMR 疫苗信息的可能性相关。但是，此过程因提供的证据类型和说话者的专业知识而异。结果和局限性在疫苗传播和社交媒体的背景下进行了讨论。