The bigger issue at hand may be that many Americans fall into a large, uncertain middle ground – neither firmly pro-vaccine nor staunchly opposed.

Countywide vaccination rates that appear strong enough to prevent measles outbreaks can conceal much higher risks inside individual schools, according to new Cornell University research that suggests public health officials may need more detailed data to identify vulnerable communities.

The emergency authorizations of several COVID-19 vaccines in late 2020 and early 2021 led the world to its next phase of the pandemic: getting these novel shots into arms worldwide. This map shows the partial vaccination rate of populations across the world.