The Immune Systems of Mice Reared in Clean and in Dirty Conventional Laboratory Farms. II. Primary Antibody-Forming Activity of Young and Old Mice with Long Life-Spans

Abstract
Takashi Makinodan, PhD, Fumitoshi Chino, MD, William E. Lever, PhD, Bobbie S. Brewen, MS; The Immune Systems of Mice Reared in Clean and in Dirty Conventional