title: [Studies on isolation of virus from patients seemingly affected with influenza--isolation of influenza virus by MDCK cells stored in a frozen state].
mesh_terms: D002478:Cells, Cultured; D005615:Freezing; D006801:Humans; D007251:Influenza, Human / Q000382:microbiology*; D009975:Orthomyxoviridae / Q000302:isolation & purification*