Ключевые слова: avoid, blocking, caution, concept, corona, coronavirus, covid, covid19, disease, distance, elevator, epidemic, flat, floor, flu, footprint, guide, health, icon, ill, illustration, infection, lift, medical, notice, outbreak, pandemic, people, person, prevention, print, protection, public, quarantine, red, safety, shoe, sick, sign, social, social distancing, spread, stand, sticker, symbol, touch, virus, warning, zone,