Word: mucus
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Dates: during 1990-1990
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...virus spreads easily, traveling in droplets spewed into the air by sneezing and coughing or through contact with mucus on hands or objects. Transmission is faster in places with poor ventilation, such as rooms with closed windows, crowded classrooms, nursing homes and public transportation systems. On planes, where the air is continuously recirculated, just one flu- ridden passenger can infect all the rest...