TY - GEN AU - Harris,R J AU - Dougherty,R M AU - Biggs,P M AU - Payne,L N AU - Goffe,A P AU - Churchill,A E AU - Mortimer,R TI - Contaminant viruses in two live virus vaccines produced in chick cells SN - 0022-1724 PY - 1966///0723 KW - Animals KW - Avian Leukosis Virus KW - Chick Embryo KW - In Vitro Techniques KW - Measles Vaccine KW - Neutralization Tests KW - Viral Interference KW - Viral Vaccines KW - Virus Cultivation KW - Yellow Fever N1 - Publication Type: Journal Article UR - https://doi.org/10.1017/s0022172400040286 ER -