The clotting substances were derived from the blood of hundreds of donors and then concentrated to treat hemophilia.

More immediately, researchers foresee animal clones that will be miniature drug factories, making drugs like the blood clotting factor for treating hemophilia that are now extraordinarily expensive.

In the 1980s, numerous companies, including Bayer's Cutter Biologic division, produced unsafe blood products to treat hemophilia.

Bayer's production of Kogenate, a blood-clotting drug for treating hemophilia, has been riddled with problems, resulting in huge shortages of the drug.

He was diagnosed with HIV at age 11, through the use of tainted blood products used to treat hemophilia, a bleeding disorder that he was born with.

But Dr. Verma wants to use his vector to treat hemophilia and hopes to apply for Federal permission for a clinical trial in a year or so.

The gene directs cells to produce a human protein used to treat hemophilia.

The Army, he said, is considering using factor VIIa, a clotting drug recently approved for treating hemophilia.

The company primarily focuses on products to treat hemophilia, kidney disease, immune disorders and other chronic and acute medical conditions.

Antifibrinolytic agents may be used in specific situations or in combination with clotting factor replacement to treat hemophilia.