FIGURE 2.8 Infection cycle in eukaryotes: Infection cycle of an enveloped virus (influenza A virus). Different steps of viral infection and the

participating viral proteins are indicated. [Source: Zhu W, Wang C, Wang BZ. From variation of influenza viral proteins to vaccine development. Int J

Mol Sci. 2017;18(7):E1554.]

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Bioprocessing of Viral Vaccines