Your sneeze can produce 40,000 infectious aerosol droplets, which travel at speeds of anywhere between 47 mph and 649 mph. Oddly, science hasn’t apparently devoted a lot of timing finding out the actual speed of your airborne mucus, but it varies by your age and the size of the sneeze in question.
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Turns out that kissing is a biological imperative: Science shows it helps boost our immunities to certain diseases. Want to beat the Cytomegalovirus, a bug that is carried in saliva and is usually harmless but can cause major problems during pregnancy. So here’s what science says: “Female inoculation with a specific male’s cytomegalovirus is most efficiently achieved through mouth-to-mouth contact and saliva exchange, particularly where the flow of saliva is from the male to the typically shorter female.”
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