It is safe to travel by train, proclaims the train. Science disagrees. For example, Taryn Young from Stellenbosch University in Cape Town found out: At the moment it is better to generally avoid using public transport. Because there is a risk of infection that should not be underestimated. The answer to the question of exactly how high it is also depends on the particular study. One of them comes from Martin Kriegel, head of the Hermann Rietschel Institute at the Technical University of Berlin.