HHS COVID-19 Monthly Outcome Survey - Wave 18

The Monthly Outcome Survey (MOS) was designed to assess COVID-19 vaccine uptake as well as beliefs, intentions, and behaviors relevant to COVID-19 vaccination at a point in time. The survey fielded on a monthly basis from January 2021 to April 2023. When the MOS first launched, it focused on the primary series of COVID-19 vaccines; in later waves, it was expanded to assess parents’ intentions to get their children vaccinated or boosted and to track booster and updated vaccine uptake and readiness. The MOS fielded as part of an online omnibus survey, conducted with a cross-sectional sample of approximately 5,000 U.S. adults each month.

《月度结果调查》（MOS）旨在评估某一特定时点内COVID-19疫苗接种率，以及与COVID-19疫苗接种相关的信念、意图和行为。该调查自2021年1月至2023年4月每月进行一次。MOS首次推出时，主要针对COVID-19疫苗的初级接种系列；在后续波次中，调查范围进一步扩大，以评估家长为其子女接种疫苗或加强接种的意图，并追踪加强剂和更新疫苗的接种率和准备情况。MOS作为一项在线综合调查的一部分进行，每月对大约5,000名美国成年人进行横断面抽样。