This exploratory study investigated the web accessibility of 54 official COVID-19 vaccine registration websites in the US and their concordance with the WCAG 2.0 and 2.1 guidelines. We employed AChecker, WAVE, and SortSite web accessibility evaluation tools to conduct automated analyses of these websites. The results showed suboptimal compliance with WCAG 2.0 and 2.1 guidelines, as determined using the AChecker, WAVE, and SortSite tools. These shortcomings in compliance may pose difficulties to users with disabilities as they access information on the websites. Based on our findings, we offered recommendations for states and other authorities to improve the accessibility of their websites to ensure that users with disabilities can independently schedule vaccination appointments.

中文翻译：

---

美国 COVID-19 疫苗注册网站的可访问性评估

这项探索性研究调查了美国 54 个官方 COVID-19 疫苗注册网站的网络可访问性及其与 WCAG 2.0 和 2.1 指南的一致性。我们使用 AChecker、WAVE 和 SortSite 网络可访问性评估工具对这些网站进行自动分析。结果表明，使用 AChecker、WAVE 和 SortSite 工具确定的 WCAG 2.0 和 2.1 指南的合规性欠佳。这些合规性缺陷可能会给残疾用户访问网站上的信息带来困难。根据我们的调查结果，我们为各州和其他当局提供了改善其网站可访问性的建议，以确保残障用户可以独立安排疫苗接种预约。