The amount of pollen spread in the air, measured by the aerobiological monitoring stations, will help to predict the incidence of human cases of viral encephalitis (TBE). According to a research carried out by Fondazione Edmund Mach, the quantity of pollen of some species of trees - in particular beech, hornbeam and oak- recorded over the course of a certain year is related to the cases of TBE observed two years later. Since the quantities of pollen recorded during 2020 were very high, 2022 could be affected by a particularly intense circulation of the virus.