Since vaccines for these bacteria are ineffective in young children , studies are being planned to test new vaccines . Hydroxyurea - The first effective drug treatment for adults with severe sickle cell anemia was reported in early 1995 , when a study conducted by the National Heart , Lung , and Blood Institute showed that daily doses of the anticancer drug hydroxyurea reduced the frequency of painful crises and acute chest syndrome . Patients taking the drug needed fewer blood transfusions . Regular health maintenance is critical...











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