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The USA tops the list with more than 502 thousand confirmed cases and eighteen thousand deaths (accounting for more than 18% of the total death toll and more than 30% of the infected people in the world).
Scientists and medical researchers for years have differed over the exact definition of a pandemic (is it a pandemic, or an epidemic), but one thing everyone agrees on is that the word describes the widespread occurrence of disease, in excess of what might normally be expected in a geographical region.