In the Bunyaviridae family, the virus is considered a zoonotic infection, while human infection is recorded mainly in rural areas and is associated with anthropogenic life and work in the open air, i.e. in places where there is frequent contact with animal blood in the form of a smear or wound. The disease may have been known for a long time, but its medical significance was discovered only in the 50s of the 20th century. For the first time, the study of the bite of beetles from the genus carpenter (roach) and other horseflies, which are bitten by many wild animals, was started by the Hungarian virologist Ferenc Post (1962), who described and gave the name to a new disease - the uungul virus.
He soon concluded that the main factor of spread is contact with the sap of sedge, wheatgrass, cereals and other herbaceous plants, which in workers takes on the appearance of bloody dew (the so-called green bite), attracting many insects, including horseflies bloodsucker - a carrier of the virus. Also, sometimes an attack of such a horsefly on a person could cause the appearance of a “green bite.” Finally, F. Post also observed some epidemiological features of the disease, for example, the sporadic dynamics of incidence due to unstable weather conditions, the lack of seasonality of the year. In the second half of the last century, many researchers addressed this problem. The lethality of the disease in humans was noted, and the acquisition of specific resistance by some experimental animals; they even introduced specific vaccination among humans. There have also been reports of the possibility of birds becoming infected with the Uungul virus. Experiments on experimental transmission of the virus through mosquitoes and other variants of infection have had positive results. Work on studying individual aspects of the problem,