The new virus is called G4 and is genetically derived from H1N1, which caused a pandemic in 2009. Researchers from Chinese universities and the Chinese Center for Disease Control and Prevention point out that this new virus has all the properties that make it easily contagious to humans.
Between 2011 and 2018, researchers took more than 30,000 nasal tissue samples from abattoirs in Chinese provinces. The obtained data allowed to differentiate 179 swine influenza viruses.
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Most of them have been of a new type that have spread among pigs since 2016. The main symptoms are fever, cough and runny nose.
Experiments with ferrets have shown that human immunity to seasonal flu does not provide protection against G4. Blood samples show that 10.4 percent of workers who have been in contact with pigs had antibodies to the virus – they were already infected.
