Ключевые слова: balkans, belgrade, beograd, concrete hala, corona, crisis, crowd, crowded, economy, epidemic, face mask, facemask, friend, friendship, groceries, health, illness, infection, koronavirus, koronavirus u srbiji, male, man, mask, men, pandemic, people, pollution, prevention, protection, respiratory, responsibility, safety, sars cov 2, sava, serbia, srbija, urban, virus, walk, walking, wear a mask, young, youngsters, youth,