Herd immunity protects those with vulnerable immune systems. Here's how. JD Vance said the India-Pakistan conflict was ‘none of our business’ - until receiving ‘alarming intelligence’: report ...

New analysis of data from the Illinois Board of Education found less than half of Chicago Public Schools had herd immunity ...

The relentless measles outbreak that’s taken over North America since the start of 2025 may indicate the world is “post herd ...

A Sun-Times analysis of state data found the rate of vaccinations has dropped sharply from the rate in 2019, when 90% of schools were at herd immunity.

Below that threshold, a community's herd immunity can begin to erode. In Gaines County, Texas, the epicenter of the outbreak in that state and where measles is still spreading, the kindergarten ...

Measles outbreaks are surging in North America and Europe, prompting warnings that the world may be entering a "post-herd-immunity" era due to declining vaccination rates and misinformation.

A Sun-Times analysis found less than half of Chicago Public Schools are at a 95% measles vaccination rate, the federal Centers for Disease Control and Prevention’s benchmark for herd immunity.