Spanish flu went around the world several times without massive international travel
You do know that there was a war on then, right? Two million Americans and 424,000 Canadians went to Europe, 335,000 Australian and 100,000 New Zealanders were deployed overseas. About a half million Africans fought in Europe. There were civilian laborers too, including about 140,000 brought from China. Thats how the virus spread.
And you think that todays travel has less movement than that????????????????????????????????????????????????
FOr the people who cant seem to comprehend that travel today is far more fluid than during the Spanish flu..there are sites that reveal passengers who fly
and add to that other lines of transportation
boggles my mind that people think more people were transported during the Spanish flu than in 2020.