viral entry into host cell

Viral attachment to the host cell is not part of viral entry in GO because virus attachment does not always lead to viral entry: attachment can also result in the virion being carried by the host cell to another location.

viral entry into host cell

Viral attachment to the host cell is not part of viral entry in GO because virus attachment does not always lead to viral entry: attachment can also result in the virion being carried by the host cell to another location.