Before revision:  We compare demographics, social capital, income, religious status, and political affiliations of these three groups to investigate the scope and causes of public opinions. A lower vaccine acceptance level for potential COVID-19 vaccines is observed among socioeconomically disadvantaged groups. We further aggregate opinions at the state and country levels, and find that the  percentage of the pro-vaccine group is lower in the Southeast part of the United States.
After revision:  We aggregate opinions at the state and country levels, and find that the percentage of the pro-vaccine group is lower in the Southeast part of the United States.