plume from a human<unk> . While generally harmless in healthy individuals,<unk> s spread disease through the infectious aerosol droplets, commonly ranging from 0.5 to 5 µm. A<unk>  can produce 40,000 droplets. To reduce the possibility of thus spreading disease (such as the flu), one holds the forearm, the inside of the elbow, a tissue or a handkerchief in front of one's mouth and nose when<unk> ng. Using one's hand for that purpose has recently fallen into disuse as it is considered inappropriate, since it promotes spreading germs through human contact (such as handshaking) or by commonly touched objects (most notably doorknobs). Until recently, the maximum visible distance over which the<unk>  plumes (or puffs) travel was observed at , and the maximum<unk>  velocity derived was 4.5 m/s (about 10 mph). In 2020,<unk> s were recorded generating plumes of up to .
Sneeze
Nasal congestion
Cough
Habit cough
Phlegm
Bad breath
Sore throat
Hajj Cough