Ключевые слова: 3d render, alert, attention, boundary, conceptual, corona, coronavirus, covid, crisis, dangerous, disease, door, doorway, entrance, entry, epidemic, flu, hazard, health, illness, infection, influenza, information, lock, lockdown, no people, notice, obstacle, outbreak, pandemic, panic, plastic, policy, prevention, protection, quarantine, ribbon, risk, safety, spread, stop, striped, stripes, tape, threat, vaccine, virus, warning, window,