H1N1 influenza

In March 2009, the "human swine flu" outbreak occurred in Mexico and spread rapidly worldwide. The WHO initially referred to this type of influenza as "human swine flu," and later renamed it "influenza A H1N1." On June 11, the WHO announced that the warning level for the H1N1 influenza pandemic was raised to level 6, and the world entered the pandemic phase. The flu is a new type of respiratory infectious disease. Its pathogen is a new type A H1N1 influenza virus strain. The virus gene contains three influenza virus gene fragments of swine influenza, avian influenza and human influenza. Influenza is a new-onset disease, and its disease law remains to be further observed and studied.