Page 29 of articles about biosecurity

This type of investment may not be crazy when it comes to protecting farms with high genetic value (others are dependent on) or insemination centres.

Pigs can act as a source of new influenza strains with zoonotic potential, but the increase of the genetic diversity of the swine influenza viruses is largely due to the introduction of influenza strains of human origin. Therefore, it is highly recommended that all staff that has frequent contact with pigs should be vaccinated against influenza.

Flies are not usually seen as a real risk of infection between farms unless we're talking about very high-density areas. However, flies can travel long distances if captured when collecting carcasses.

The author questions whether the US virus is more virulent than the strain CV777 isolated in Europe in 1977 or whether the disease is indeed more devastating now than it was in the seventies in Europe.