Ключевые слова: alert, background, business, color, concept, contamination, control, coronavirus, covid, covid19, crisis, day, depression, design, despair, disease, education, flu, health, illness, infection, learning, lockdown, medical, mental health, negative, notification, outbreak, pandemic, policy, prevention, protect, protection, restriction, restrictions, safety, school closed, schools closed, shut down, shutdown, sign, spread, symbol, text, trend, warning, wooden, word, work,