english: They found in the late '30s -- 10 years after they'd made these dams -- that the people in Northern Alabama were infected with malaria, about a third to half of them were infected with malaria.
non_english: In de jaren ‘30, 10 jaar nadat de dammen waren gebouwd, vond men mensen in Noord Alabama die besmet waren met malaria. Ongeveer de helft tot een derde van hen was besmet met malaria.