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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.

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.
Steven Johnson describes the origins of cholera and how interventions stopped the spread.
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
Historians and public health practitioners talk public health's impact on life expectancy.
How the 1854 cholera outbreak led to the birth of the modern public health system.
Public health saved your life today and you don't even know it.
Data has been an essential public health tool since at least the seventeenth century.
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.