`Mad Cow' Fear Leads U.K. to Destroy Parts Of All Donated Blood.

Reports on the rebound in domestic consumption of beef in Great Britain. The scare from the so-called mad-cow disease; Reason scientists believe that people can eat British beef without fear of the brain disease; The British government's decision to reduce the risk of infection by destroying nearly all the plasma from all blood donations in Britain; The question of overreaction to the problem; Brief background of research on bovine spongiform encephalopathy or BSE.