The pig flu epidemic in the Gubaiyou season was renamed Type A flu.

The swine flu epidemic in the season of Gubaiyou has been renamed as Type A influenza.

In a brief notice posted on its website that day, the WHO said that starting from May 30, the WHO would use the term "A (H1N1) Influenza" to refer to this new influenza virus.

The WHO has repeatedly stated that although this new virus evolved from swine flu, it has only been observed to cause illness in humans so far, with no cases of pigs being infected discovered yet. The WHO also emphasized that consuming thoroughly cooked pork or pork products will not result in viral infection.

Spokesperson Thompson of the WHO told the media that the reason for changing the name of the current epidemic is because the term "swine flu" can easily mislead consumers, and concerns have been expressed by the agricultural sector and the UN Food and Agriculture Organization.

There are three types of influenza viruses:

Type A (A-type) Influenza Virus: Infects mammals (humans, pigs, ferrets, horses) and birds.

Type B (B-type) Influenza Virus: Only infects humans. It has only one type of protein on its surface, making it simpler. However, the sequence of the protein can vary. Outbreaks of Type B virus can also cause regional epidemics, but the disease caused is usually milder than that of Type A virus.

Type C (C-type) Influenza Virus: Only infects humans and does not cause severe diseases.