Ключевые слова: balkans, belgrade, beograd, bus, crisis, danger, disease, epidemic, face, face mask, facemask, gsp, health, illness, infection, infectious disease, koronavirus, koronavirus u srbiji, male, man, mask, medical, pandemic, people, prevention, protection, public transportation, respiratory, safety, sars cov 2, serbia, srbija, switch, transport, transportation, virus, young, young man, youngsters, youth,