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It is easy to think that the idea of an "aura" that surrounds us belongs strictly to the plane of esotericism.
A quick search on the Internet offers dozens of tips for "cleaning the aura" and "moving away negative energies". . And this may be the only context in which you have seen the word, usually badociated with emotions and how they can affect your physical and mental well-being.
But apart from esotericism, science has demonstrated the existence of an individual "living aura": this is called a human expo and has nothing to do with spiritual energies.
The term describes this personal cloud of micro-organisms, chemical elements and other compounds that accompany us wherever we are.
- Scientific discovery that protects millions of people from the most common badually transmitted virus
The exposome is at the center of a study developed by a group of geneticists from Stanford University (California, United States) for five years.
And although science has already had notions about this concept, the research, published in the scientific journal Cell in mid-October, showed that it measures "at the individual level" the elements of the concept. Environment to which each person is exposed.
"The living aura" of each individual has been studied by science. Each person has his own and accompanies us wherever we go.
Michael Snyder – who was the original idea of the study – told BBC World that the most important thing "was that these measures could make a big difference in the way we study and prevent diseases such as diabetes." 39, asthma and allergies ", which is an important contribution to the field of health.
Experience
For their experience, researchers made a small air monitoring device and attached it to the arm. 15 volunteers, exhibited at different locations while the device was absorbing samples of their personal orbits and the surrounding environment.
The elements collected by the device (bacteria, fungi, viruses, etc.) have projected sequences of DNA and RNA. forming a unique chemical profile for each volunteer.
According to this representation of the human exposome, each color of this cloud represents what s different environmental factors to which people are exposed: bacteria, fungi, and so on. The red dot is the human body.
By the end of the study – which included hundreds of thousands of readings – the researchers were able to accumulate a large amount of data on the components of their own exposome.
Snyder himself, who used one of the devices during the study found that compounds such as eucalyptus pollen, presumably at the origin of 39, an allergy that had suffered in the past, were present in the present.
Individual Cloud
What Was Known About Human Exposure Before The fact that Snyder and his team made known the results of their research shows that individuals are certainly exposed to a series of elements present in the environment.
However, the measures in this sense have only been developed on a large scale and
"This is why we focus mainly on the PM2.5 particles present in the atmosphere, that result from the pollution and end up being absorbed into the lungs, "says Chao Jiang, another of the authors of the study.
The team of researchers hopes to be able to manufacture less expensive measuring devices, available to a larger number of people.
At the time, the exposome had also been badyzed only in fixed locations in the city, in which a device had taken a sample of air.
"We can now track what everyone is exposed to, wherever they are," says Snyder.
The volunteers traveled to different areas of San Francisco Bay and it was shown that even when they were in the same place, their exposomes were different.
This confirms that each individual is surrounded by his own microbial cloud, which continually gathers and expels around him.
The authors of the study agree that the greatest contribution of this new information will be in the field of human health, which is not only determined by genetic, but also environmental factors.
Available to all
"Many genetic factors have been studied, but little is known about how environmental exposure affects people's health," said Jiang. 19659002] The scientist thinks that this new deepening of the knowledge of the human exposome will be essential to understanding and even preventing diseases such as cancer, asthma, allergies and some heart and respiratory diseases.
Laboratory images from before (right) and after (left) exposing volunteers to the outside environment
In fact, one of the most relevant findings from the comprehensive survey is that insect repellent particles were found in all samples collected.
"People may be yearning for this compound – which we do not know how toxic it is for health – as well as diethylene glycol, which is highly carcinogenic and has been found everywhere," says Snyder.
He, Jiang and his other companions have not finished studying the "living aura" that surrounds us.
And to answer the BBC's question about Geneticists define a plan.
"We want to make a device cheaper, so that everyone can map their individual exposures to the environment," Jiang said.
"Conditions such as asthma and allergies can be better controlled when we are able to understand the reactions of these patients," he explains.
In the medium term The team also plans to implement this technology in areas most exposed to environmental contamination, such as hospitals and nurseries.
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