Letter: Blood as a substitute for colostrum.
D000818:Animals; D000831:Animals, Newborn / Q000276:immunology; D001803:Blood Transfusion; D002417:Cattle / Q000276:immunology; D003126:Colostrum / Q000276:immunology*; D007116:Immunization, Passive; D012756:Sheep / Q000276:immunology