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Annu Rev Public Health

Community health workers in low, middle, and high income countries: an overview of their history, recent evolution, and current effectiveness.

Over the past half-century, community health workers (CHWs) have been a growing force for extending health care and improving the health of populations. Following their introduction in the 1970s, many large-scale CHW programs declined during the 1980s, but CHW programs throughout the world more recently have seen marked growth.

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