GROUP OF ATTENUATED STRAINS OF INFLUENZA A VIRUS BASED ON SYNONYMOUS MUTATION AND/OR DELETION MUTATION, AND PREPARATION METHOD THEREFOR AND USE THEREOF

Provided are a group of attenuated strains of the influenza A virus based on synonymous mutation and/or deletion mutation, and a preparation method therefor and the use thereof. The attenuated strains are obtained by modifying an M2 gene; the modification comprises performing synonymous mutation on...

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