Research history

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## What happened

Hookworm larvae live in soil polluted by human waste and burrow in through the skin, often through bare feet. Infected children are often listless, anemic and stunted. In 1909 John D. Rockefeller gave $1 million to create the Rockefeller Sanitary Commission for the Eradication of Hookworm Disease, a five-year effort across eleven Southern states.

The commission started by measuring. It surveyed hundreds of counties and found that, on average, about 40 percent of school-age children were infected. Then it went to work: traveling dispensaries gave free treatment, lecturers and exhibits taught doctors, teachers and families to recognize the disease, and the campaign pushed for sanitary privies at schools and churches. It treated more than 400,000 people. In Arkansas, children were required to wear shoes to school, and meetings took on a carnival air, with testimonials, singing and refreshments.

The commission closed at the end of 1914. State governments had increased their own anti-hookworm spending as it wound down, and the newly founded Rockefeller Foundation carried the model abroad. Resurveys found infection had fallen by about 30 percentage points across the infected areas.

Hookworm was not eradicated. But the economist Hoyt Bleakley found that counties with more infection before the campaign saw bigger gains afterward in school enrollment, attendance and literacy. Following those children into adulthood, he found a substantial gain in income.

## Where it sits in the system

The campaign worked at several depths at once. Treatment was **repair** (level 1). Privies and shoes were **prevention** (level 2). Its lasting effect, the Rockefeller Archive Center notes, was to set a model for public health by building services into state and local government. That is **structure** (level 3) on the [depth scale](/method/#depth), and it is why a commission with a five-year life could have effects that lasted.

It is also an early answer to the [Measurement Gap](/diagnosis/measurement-gap/). Because the commission surveyed before it treated, it knew where the problem was worst and could check its own progress. Nobody had to guess. And it avoided the [Symptom Trap](/diagnosis/symptom-trap/) by pairing treatment with the sanitation that stops reinfection.

## What carries over

Measure the problem before you treat it, and plan for who will carry on the work when you stop. A short-lived funder can leave behind a permanent public capacity if it builds through the institutions that will remain. Be careful with words like “eradication” unless eradication is really on the table.

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    "body": "\n## What happened\n\nHookworm larvae live in soil polluted by human waste and burrow in through the skin, often through bare feet. Infected children are often listless, anemic and stunted. In 1909 John D. Rockefeller gave $1 million to create the Rockefeller Sanitary Commission for the Eradication of Hookworm Disease, a five-year effort across eleven Southern states.\n\nThe commission started by measuring. It surveyed hundreds of counties and found that, on average, about 40 percent of school-age children were infected. Then it went to work: traveling dispensaries gave free treatment, lecturers and exhibits taught doctors, teachers and families to recognize the disease, and the campaign pushed for sanitary privies at schools and churches. It treated more than 400,000 people. In Arkansas, children were required to wear shoes to school, and meetings took on a carnival air, with testimonials, singing and refreshments.\n\nThe commission closed at the end of 1914. State governments had increased their own anti-hookworm spending as it wound down, and the newly founded Rockefeller Foundation carried the model abroad. Resurveys found infection had fallen by about 30 percentage points across the infected areas.\n\nHookworm was not eradicated. But the economist Hoyt Bleakley found that counties with more infection before the campaign saw bigger gains afterward in school enrollment, attendance and literacy. Following those children into adulthood, he found a substantial gain in income.\n\n## Where it sits in the system\n\nThe campaign worked at several depths at once. Treatment was **repair** (level 1). Privies and shoes were **prevention** (level 2). Its lasting effect, the Rockefeller Archive Center notes, was to set a model for public health by building services into state and local government. That is **structure** (level 3) on the [depth scale](/method/#depth), and it is why a commission with a five-year life could have effects that lasted.\n\nIt is also an early answer to the [Measurement Gap](/diagnosis/measurement-gap/). Because the commission surveyed before it treated, it knew where the problem was worst and could check its own progress. Nobody had to guess. And it avoided the [Symptom Trap](/diagnosis/symptom-trap/) by pairing treatment with the sanitation that stops reinfection.\n\n## What carries over\n\nMeasure the problem before you treat it, and plan for who will carry on the work when you stop. A short-lived funder can leave behind a permanent public capacity if it builds through the institutions that will remain. Be careful with words like “eradication” unless eradication is really on the table.\n",
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        "Measuring the problem first gave the campaign a baseline. County surveys before treatment, and resurveys after, showed whether the work was paying off.",
        "A time-limited funder can leave something permanent by working through public agencies. State and local governments took over some of the work as the commission wound down.",
        "Treating infected people repairs the damage, while privies and shoes stop new infections. Treatment alone lets a parasite come back.",
        "A name can overpromise. The commission was for “eradication,” and hookworm was reduced, not eliminated."
      ],
      "place": "Southern United States",
      "sources": [
        {
          "note": null,
          "publisher": "Hoyt Bleakley, Quarterly Journal of Economics 122(1)",
          "title": "Disease and Development: Evidence from Hookworm Eradication in the American South",
          "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC3800113/",
          "year": 2007
        },
        {
          "note": null,
          "publisher": "Liesel Vink, Rockefeller Archive Center",
          "title": "Photo Essay: The Rockefeller Sanitary Commission and the American South",
          "url": "https://resource.rockarch.org/story/the-rockefeller-sanitary-commission-and-the-south/",
          "year": 2019
        },
        {
          "note": null,
          "publisher": "Rebecca Haden, Encyclopedia of Arkansas",
          "title": "Hookworm Eradication",
          "url": "https://encyclopediaofarkansas.net/entries/hookworm-eradication-2233/",
          "year": null
        }
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      "summary": "A five-year, $1 million Rockefeller commission surveyed hundreds of Southern counties, treated more than 400,000 people for hookworm and pushed for sanitary privies. Hookworm was not eradicated, but school enrollment and literacy rose most where infection had been worst.",
      "title": "The hookworm campaign in the American South"
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