BEIJING, April 3 (Xinhua) — Harvey Feinberg, head of the National Academy of Sciences’ Committee on Emerging Infectious Diseases, has come up with a disturbing concept: The new coronavirus is spread not just through droplets emitted when coughing or sneezing, it can also be transmitted through the air. Although, the current study is not conclusive. But the Centers for Disease Control and Prevention has recommended that Americans wear masks in public to reduce the spread of the virus.
Scientific reports on new coronary pneumonia (COVID-19) are supported by the Pulis Center.
Until now, the U.S. Centers for Disease Control and Prevention and other health agencies have maintained that the main route of transmission of the new coronavirus is through larger droplets (up to 1 mm in diameter) that people spray when coughing or sneezing.
Gravity, which is affected by gravity, places the droplet liquid on the ground within 1 or 2 meters. Although the virus deposits on the ground, people can “pick up” the virus from the ground and infect it by touching their mouths, nose or eyes. However, if the coronavirus can be suspended in the ultra-fine fog that occurs when we exhale, protection will become more difficult, reinforcing the idea that everyone should wear a mask in public places to reduce the unknowing spread of the virus from asymptomatic carriers.
Earlier this year, researchers published an article in the New England Journal of Medicine that said the new coronavirus, known in English as SARS-CoV-2. It can be suspended in aerosol droplets less than 5 microns in diameter for up to 3 hours and remains infectious. In their discussion, Feinberg and his colleagues at the National Academy of Sciences cited other studies, including a recent study by Joshua Santarpia of the University of Nebraska Medical Center and his colleagues. The study found a wealth of evidence to confirm the presence of viral RNA in the isolation room of patients treated with new coronary pneumonia (COVID-19). Viral RNA appears on hard-to-reach surfaces and in air samplers more than 2 meters away from the patient. Santapia and his colleagues concluded that although no infectious virus particles have been found yet, the presence of RNA suggests that the virus can be transmitted by aerosols.
The National Academy of Sciences expert group has a different view: personal protective equipment (PPE) itself may be a source of air pollution. For the study, researchers led by Liu Yuan of Wuhan University in China found that the new coronavirus can refloat in the air when medical staff remove their personal protective equipment, clean the floor and pass through the infected area.
In summary, the panel concluded: “The presence of viral RNA in air droplets and aerosols suggests that the virus may spread through these channels. “
Kimberly Prather, an aerosol chemist at the University of California, San Diego, wrote in an email to Science Insider: “I’m glad to see that the idea that aerosols can spread … This new route of air transmission helps explain why the virus can spread so quickly. “
However, not all experts agree that aerosols are a possible route of transmission. In a scientific summary published on March 27th, the World Health Organization (WHO) states that “aerosol propagation is possible in specific situations and environments where aerosols may occur, for example, when respiratory tubein estosis is used in seriously ill patients”. However, WHO experts say analysis of more than 75,000 cases of coronavirus in China shows that there have been no cases of infection transmitted through air. As for the Santrpia et al. study, they note that “PCR-based detection methods to detect RNA in environmental samples do not mean that there is a live virus that can spread.” “