Learn how data collection has been an essential public health tool for centuries. Increasing understanding and mitigating the spread of disease, data has helped make sense of the threats to collective health.

The Invisible Shield, a four-part documentary series, reveals a little-known truth: that public health saved your life today and you probably don’t even know it. But while public health makes modern life possible, the work itself is often underfunded, undervalued, and misunderstood putting our health at risk.