Ключевые слова: asia, asian, cell phone, certificate, city, commute, coronavirus, cough, covid 19, covid19, digital, disease, display, female, girl, health, ill, immunity, infectious disease, internet, mask, metro, mobile, mrt, passenger, passport, people, phone, pneumonia, qrcode, security, smart phone, smartphone, station, subway, taiwan, technology, telephone, traffic, train, transmissible, transport, transportation, travel, urban, vaccinated, vaccination, vaccine, virus, woman,