摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for preparing high titer influenza viruses for vaccines and gene therapy. <P>SOLUTION: The present invention provides the method for preparing high titer influenza viruses in the absence of a helper virus, comprising a sequence from, for example, the high titer influenza viruses. <P>COPYRIGHT: (C)2013,JPO&INPIT |