Liquid shielding, its manufacturing method, and the face mask subvisor

Publication Date

November 19, 1985

Patent Number

JP2939627B2

Abstract

Live Sendai viruses are modified in fertile chicken egg embryos to be administered as a vaccine through an aerosol for the immunization of animals against Sendai disease. The live Sendai viruses are diluted by at least thirty-one passages in fertile chicken egg embryos. Twenty passages are at a lower than normal incubation temperature and the remaining passages are at the normal incubation temperature.