Not necessarily. It could be same ancestral source or the mouse could have been the original vector, not the bats. Vector and mutation tracing is not an exact s

Not necessarily. It could be same ancestral source or the mouse could have been the original vector, not the bats. Vector and mutation tracing is not an exact science, but a probability game - nobody catches all mice everywhere, or has access to all intermediate variants. Now, the origin in a different country does suggest a human host somewhere but it is not strictly necessary.