immunity. the disease is more common in cooler countries and may be influenced by humidity. the incubation period of the disease is generally considered to be approximately one week although four weeks has been suggested as the period in some outbreaks. factors that influence susceptibility of an animal...
immunity. the disease is more common in cooler countries and may be influenced by humidity. the incubation period of the disease is generally considered to be approximately one week although four weeks has been suggested as the period in some outbreaks. factors that influence susceptibility of an animal...