The existence of the Mexican flu has raised many questions ; here are some examples . Swine flu was first identified in 1930 when scientists found the virus in a pig . ` Why people are dying in Mexico but not in other places is still a mystery . While the virus can survive on surfaces , transmission is unlikely .
The existence of the Mexican flu has raised many questions ; here are some examples . Swine flu was first identified in 1930 when scientists found the virus in a pig . Why people are dying in Mexico but not in other places is still a mystery . While the virus can survive on surfaces , transmission is unlikely .