Ciekawostka: The average talker sprays about 300 microscopic saliva

Evidence: 41 • authority: 72

A respiratory droplet is a small aqueous droplet produced by exhalation, consisting of saliva or mucus and other matter derived from respiratory tract surfaces. Respiratory droplets are produced naturally as a result of breathing, speaking (speech droplet), sneezing, coughing, or vomiting, so they are always present in our breath, but speaking and coughing increase their number. Droplet sizes range from < 1 μm to 1000 μm, and in typical breath there are around 100 droplets per litre of breath. So for a breathing rate of 10 litres per minute this means roughly 1000 droplets per minute, the vast majority of which are a few micrometres across or smaller. As these droplets are suspended in air,…

Evidence: 31 • authority: 80

Figure 4: Average percentage of session time spent on the platform and freezing, average duration of visits to the platform in seconds, and rate of step-down responses per minute.

Evidence: 31 • authority: 80

Average Heart Rate in Beats per Minute

Evidence: — • authority: 35