Process for preparing virus disease live vaccines

摘要

Process for preparing a virus disease live vaccine by employing culture of a quail embryonated egg or tissue culture of a quail embryo fibroblast for cultivation of the virus. The vaccine obtained according to the present invention is effective for immunization of animals and humans against the virus disease. The vaccine is avirulent, scarcely subject to induction of unfavorable factors accompanying the present tissue used for isolation of the virus therefrom, and economically productible.