Ключевые слова: air, asia, asian, breath, care, coronavirus, covid19, disease, distance, environment, epidemic, face, face mask, filter, flu, health, healthcare, ill, illness, infection, influenza, lockdown, malaysia, mask, medical, mrt, outbreak, pandemic, people, person, pollution, prevention, protect, protection, protective, public, safety, sick, social, spread, street, surgical, tourist, train, travel, unhealthy, virus, wear, wearing,