How to distinguish the swine flu with ordinary flu? The high incidence, mortality?

Bird flu virus has caused no interpersonal communication, it is with influenza virus pig difference. Bird flu is present from birds to people’s communication, swine flu can already in interpersonal communication.
Look from the symptoms appear, flu-like symptoms, and therefore is not very good.
The morbidity and mortality has no statistics, still cannot compare. But both in [...]