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Asia is world’s cradle for new strains of flu (AP)

This undated graphic provided by the journal Science shows the path pf  seasonal influenza A (H3N2) strains that constantly evolve in overlapping epidemics and East and Southeast Asia, which periodically spread to the rest of the world. Asia is the world's cradle for new flu strains. South America is where each year's epidemic goes to die. In between, the virus catches a ride to North America and Europe almost simultaneously, report international researchers who have finally pinpointed exactly how the most common type of influenza sweeps the globe each year. (AP Photo/NASA, University of Cambridge, Science)AP - Scientists have pinpointed the cradle-to-grave path that flu takes as it sweeps the globe every year — starting with the birth of new strains in Asia and ending when the virus burns out in South America.


Oryginal: AP

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