Until recently, the World Health Organization has said that coronavirus infection occurs only when exposed to a surface. Scientific evidence was also being smuggled. That was why world health organization officials had advised washing hands primarily to prevent COVID-19 disease. But now they are saying that the possibility of 'air transition' cannot be ruled out under special circumstances. This means that when people talk to each other or breathing, microscopic particles can also cause coronavirus infection. If confirmed by scientific evidence, it will affect the guidelines for the prevention of infection in the places within the boundary wall.

What does 'transition from air' mean?

Air infection occurs when we breathe bacteria or viruses. These bacteria or viruses reach us through microscopic particles floating in the air. These microscopic particles can remain in the air for hours. Small drops of cuffs can spread to large areas. Tb (tuberculosis), flu, and pneumonia are examples of airborne diseases. The World Health Organization has acknowledged that there has been evidence that coronavirus infection can occur through the air in closed and crowded places.

How long does it survive in the air?

Research had shown that when the coronavirus was sprayed artificially in the air, it was found that the coronavirus could survive for up to three hours. But scientists also say that these experiments were carried out in the laboratory's controlled environment, and the results in real life may be different. The rapid increase in coronavirus infection has strengthened fears that the epidemic could also be infected through the air. A man is suspected of infecting at least 45 people at Mount Vernon in Washington, U.S.A. These people were members of a singer troupe. Some of those who were infected had not broken any rules for social dissing. A similar case was reported in Guangzhou, China, in late January. The man was suspected of infecting the corona to at least nine people. All the people had eaten in the same restaurant. Scientists say an infected customer at the restaurant was sitting six meters from that person.

What should we do now?

The way a disease spreads determines what steps to take to prevent it. Under the existing guidelines issued by the World Health Organization, it is advisable to wash hands with soap for 20 seconds with lukewarm water. In addition, who has also advised following the rules of social dissing. But some scientists now say that these precautionary measures have their own importance, but they will be inadequate in the face of the spread of air infections. So far, the WHO has added nothing new to its existing guidelines, but it evaluates the new evidence. If confirmed, the official advice can add to the large-scale use of masks. Social dissing rules can be advocated for further tightening, especially in bars, restaurants, and public transport. In places where air conditioners are arranged, some strict rules may also be considered.

What is the process of changing WHO's guidelines?

Recently, 239 scientists from 32 countries wrote an open letter to the World Health Organization. He had appealed to the World Health Organization to update its guidelines because of the possibility of corona infections spreading through the air. "We want him to accept the evidence associated with it," says Jose-Luis Jimenez, a University of Colorado chemistry who signed the letter. Jimenez adds, "This is certainly not an attack on the World Health Organization. This is a scientific debate. But we felt we needed to go public because he was refusing to see and hear the evidence even after a long conversation."

Benedetta Allegranzi, technical lead at the Who's Department of Infection Prevention and Control, said in response to the letter that coronavirus infection cannot be ruled out by air in crowded, closed, and poor places air-air areas. However, the World Health Organization has also said that it will examine more evidence before making a decision. Dr. David Heyman, another WHO advisor, says that the research that is taking place in this regard is expected to give the agency concrete results to create a new strategy for the prevention of the virus.

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