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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.

Steven Johnson describes the origins of cholera and how interventions stopped the spread.
How the 1854 cholera outbreak led to the birth of the modern public health system.
Historians and public health practitioners talk public health's impact on life expectancy.
Latest Episodes
Disinformation and misunderstanding, skepticism of science, and distrust of government.
Life expectancy is declining. How do we rethink the system before it's too late?
Public health has doubled our life expectancy, but the system is in jeopardy.
Data has been an essential public health tool since at least the seventeenth century.
Extras
Public health has doubled our life expectancy, but the system is in jeopardy.
Public health saved your life today and you don't even know it.
Public health saved your life today and you don't even know it.
Life expectancy is declining. How do we rethink the system before it's too late?
Disinformation and misunderstanding, skepticism of science, and distrust of government.
Data has been an essential public health tool since at least the seventeenth century.