Chromosomal changes of cultured cells as a marker test for virulent and attenuated influenza viruses.
D000818:Animals; D002478:Cells, Cultured; D002875:Chromosomes; D009980:Influenza A virus / Q000235:genetics*; D007252:Influenza Vaccines; D051379:Mice; D014613:Vaccines, Attenuated; D014774:Virulence
D007252:Influenza Vaccines; D014613:Vaccines, Attenuated