On July 16, 2020 the fourth day activities of virtual summer school took place at GSTU. Students from partner universities attended the lectures, led by prof. Eduard Raupe . Them of the lecture: Economic prognoses during pandemic. Prof. Mari Dgebuadze on challenges and how to overcome covid 19 crises in world tourism and Prof. Berika Shukakidze on how pandemic affected education around the world.