Researchers have found that G4 is highly infectious and can be replicated in human cells, Lianhe Zaobao reported. Tests have shown that no immunity gained by human exposure to seasonal influenza is sufficient to resist the G4 virus. Humans may have little immunity to the virus. According to the results of blood antibody tests, 10.4% of pig farm workers have been infected. Up to 4.4% of the total population may have been exposed to the new swine influenza virus.
The last pandemic began in 2009 with an outbreak of swine flu in Mexico, which infected tens of millions of people around the world, but the fatality rate was not as serious as initially feared. However, scientists stressed that the new virus should not be taken lightly. Measures should be taken quickly to control the new virus in pig herds and close surveillance should be carried out on pig industry workers.