title: Attenuation of virulence with retention of antigenicity of mumps virus after passage in the embryonated egg.
authors.forename: J F
authors.initials: JF
authors.lastname: ENDERS
authors.forename: J H
authors.initials: JH
authors.lastname: LEVENS
mesh_terms: D006801:Humans; D007109:Immunity; D009109:Mumps virus; D010309:Parotitis; D014774:Virulence; D014780:Viruses