The World Health Organization (WHO) recently shared, through its website, a new scientific study that collects the different modes of contagion by the coronavirus. A post that directly targets “respiratory droplets larger than five microns”, main responsible for contagion between people since the first cases began to be registered last December in China.
As the study explains, based on the analysis of 75,465 cases of COVID-19 in China, respiratory infections can be transmitted through droplets of different sizes. When the droplets have a diameter greater than five microns, they are considered respiratory droplets. and, when they have a diameter less than said amount, they are called droplet nuclei. After analyzing thousands of cases in China, experts say that respiratory droplets are what facilitate contagion.
This is how “potentially infectious” droplets are transmitted
According to this publication, transmission occurs the moment a person is in close contact with someone who has respiratory symptoms. Every time a person is located within a radius of less than one meter from the infected person, they run the risk that both their mucous membranes (nose and mouth), as well as their conjunctive membrane (eyes), are exposed to said droplets. A series of drops that, according to the WHO, are “potentially infectious”.
As stated in the latest study published by the World Health Organization, transmission of the virus goes beyond direct contact. The WHO clarifies that transmission by indirect contact with surfaces or objects used by the infected person is also possible. For the same reason, the body reminds us of the importance of washing our hands regularly and disinfecting those products and surfaces that we touch regularly.
“If you walk down the street there is no risk of transmitting the disease”
Regarding the airborne transmission of the virus, the WHO recalls that it is different from the transmission of drops since refers to the presence of microbes within them. According to the World Health Organization, droplet nuclei can remain in the air for long periods of time and be transmitted to others at distances greater than one meter. However, the agency has wanted to emphasize the scant scientific evidence that exists about the possibility that the new coronavirus is transmitted through the air. Only in specific circumstances and settings where aerosol-generating supportive procedures or treatments are performed.
For that reason, not. There is no risk of contagion by coronavirus when breathing in the street. This was announced this Monday by la doctor from the Center for Coordination of Health Alerts and Emergencies Maria Jose Sierra, who recognizes that there is no risk of environmental contamination: “If one walks down the street there is no risk of transmitting the disease. The problem is being in contact with someone who has the infection.”