Home Science Air humidity can prolong the life of droplets up to 23x

Air humidity can prolong the life of droplets up to 23x

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After many uncertainties and fears, today there is already some knowledge about COVID-19. The advances in science have been many and the objective is to protect ourselves in the best way, but also to find a solution.

According to scientists at the University of Missouri, United States, high air humidity can extend up to 23 times the aerial life span of droplets that carry the new coronavirus.


The investigation was published today in the scientific journal “Physics of Fluids” and the theme is related to the way the virus is apparently transported by air through normal human actions (eg speaking, breathing or coughing).

COVID-19: Amazing effect of moist air on the possible spread of the disease

According to what was revealed, the researchers concluded that there is an important and surprising effect of moist air on the possible spread of COVID-19.

According to the Lusa publication, thedroplets exhaled on a normal human exhalation range in size from a tenth of a micron to 1,000 microns. To provide a basis for comparison, a hair has an approximate diameter of about 70 microns, while a typical coronavirus particle is less than a tenth of a micron.

The most common exhaled droplets are between 50 and 100 microns in diameter and contain substances such as water, lipids, proteins and salt. They also contain viruses if the person is infected.

COVID-19: Air humidity can extend the life of droplets up to 23x

The research findings highlight the fact that humidity affects the fate of the exhaled particles, as dry air can accelerate natural evaporation.

In air with 100% relative humidity, simulations showed that the largest droplets, with 100 microns, can fall to the ground up to almost two meters (1.82 meters) from the exhalation source. The smallest drops, 50 microns, can travel further, up to five meters. With a relative humidity of 50% none of the 50 micron droplets went beyond 3.5 meters.

Read study here

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