Ключевые слова: bacteria, biohazard, caution, chinese, city, contagious, contamination, cough, crowd, crowded, danger, emergency, epidemic, face, female, girl, global, health care, humans, illness, infect, infection, infectious, medical, medicine, microbe, pandemic, pathogen, pathogenic, people, person, prevention, protection, public, quarantine, risk, safety, sars, security, sick, sickness, smartphone, stop, transportation, tunnel, vaccine, virology, virus, woman,