title: Calculations for changes in sickle-cell trait rates.
mesh_terms: D000755:Anemia, Sickle Cell / Q000235:genetics*; D005787:Gene Frequency; D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D008954:Models, Biological; D012641:Selection, Genetic; D015024:Zambia