Ключевые слова: asia, asian, cell phone, cellular, certificate, city, commute, coronavirus, cough, covid19, device, disease, display, female, fever, girl, health, ill, infectious disease, internet, metro, mobile, modern, mrt, passenger, passport, people, phone, pneumonia, qrcode, security, show, smart phone, smartphone, station, subway, technology, telephone, traffic, train, transmissible, transport, transportation, travel, urban, vaccinated, vaccination, vaccine, virus, woman,