Medicarecard.com MedicareCard Replacement Medicare: Grantees rebut theory that seasonal flu strains originate in tropical regions

Medicare: Grantees rebut theory that seasonal flu strains originate in tropical regions

Influenza researchers have found that flu strains migrate back and forth between different regions of the world, evolving along the way. This is contrary to the common belief that flu strains from the tropics are the source of global seasonal epidemics.