Unfortunately we can't cure sickle cell disease, because it's in the genes, but biomedical researchers keep finding better and better ways to treat people with most diseases, or at least with many diseases.

NIH is the National Institutes of Health, which is involved with most of the medical research in the U.S.

Here's a site with a book about managing sickle cell disease that you can download as a PDF:

sickle_disease

Here's a site with lots of up-to-date info about sickle cell disease:

scklecellanemia