The Last Worm – Visualizing guinea worm eradication, from 3.5M to 10
I built this to fill the gap between phone calculators and complex software like SPSS. StatCalc handles the statistical calculations that students and researchers need most often: • Descriptive statistics with histogram visualization • Confidence intervals (proper t-distribution) • One-sample t-tests with p-values • Sample size/power analysis Clean interface, works on mobile, no installation needed. Built with vanilla JS to keep it fast and simple. Would love feedback on the UI and what other statistical functions would be most useful to add.
The Last Worm – Visualizing guinea worm eradication, from 3.5M to 10 launched on February 4, 2026 with 8 votes, #1,230 of 16,627 launches that month and more than 75% of that year's launches.
What it does
Forty years of patient, unglamorous work. The second disease in human history to be eradicated — without vaccines, without medicine, one village at a time. Guinea worm disease is caused by a parasitic nematode transmitted in water. Drink contaminated water, and a year later, a worm up to three feet long emerges from a blister in your leg over the course of weeks. There is no vaccine. There is no medicine. The only treatment is to slowly wind the emerging worm around a stick, centimeter by centimeter, day after day, for weeks. In 1986, the Carter Center began leading the global eradication campaign. The approach was almost absurdly simple: teach people to filter their drinking water. Provide…from echomoltinsson.github.io
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