The WHO defines a pandemic as the worldwide spread of a disease[1]. So the disease only becomes a pandemic after it has spread everywhere; it wouldn't make sens

The WHO defines a pandemic as the worldwide spread of a disease[1]. So the disease only becomes a pandemic after it has spread everywhere; it wouldn't make sense to call a disease a pandemic before it becomes one. [1]https://www.who.int/csr/disease/swineflu/frequently_asked_questions/pandemic/en/ https://www.who.int/csr/disease/swineflu/frequently_asked_qu...