Viruses have no nationality just as life. Life also has no nationality.
Currently, given the ease of global mobility, the same person can travel through international airports within 24 hours.
However, what should be a particular set of new virus that condition a pandemic declaration by the allegedly competent international health authorities typically does not condition a pandemic declaration by the international health authorities.
This is the standard of international health authorities that, since it has not been changed, has once again been exemplified.
The allegedly competent international health authorities are one thing, but before any declaration, a virus is already new.
There is a distinction between declarations and the allegedly declared reality.