Papers relating to Advisory Committee on the Virological Safety of Blood (ACVSB) tenth meeting 1991 including a letter from Professor R. S. Tedder to Dr R. J. Perry of Scottish Blood transfusion Service dated 7 March 1991; a Paper entitled Anti-HBc testing of blood donations International situation and Other methods for avoiding Hepatitis B transmission; Anti-HBc Screening of Blood Donations from Professor Zuckerman; a paper entitled Post Transfusion Hepatitis B transmitted by blood from a hepatitis B surface antigen-negative hepatitis B virus carrier; and a paper entitled Posttransfusion Hepatitis B