WHO changes definition of airborne disease following discussion on new coronavirus infection | News
of who defined a new set of criteria for Infection It spread through the air during the pandemic after significant controversy and confusion over how it is transmitted. coronavirus It has spread.
Nearly 500 experts contributed to the report, including epidemiologists, physicists, engineers, and public health experts. published On Thursday, he will explain in detail how pathogens previously thought to be “airborne” are transmitted.
“This is a very important statement of agreement to work together,” WHO chief scientist Jeremy Farrar said. new york times.
Previous WHO guidance maintained that only a handful of pathogens with particle sizes small enough to spread over long distances are considered airborne. However, the new guidance suggests that other criteria, such as the rate and concentration of pathogen particles, should also be considered when taking precautions during disease outbreaks.
The report explains that “airborne” is the best general term to characterize viruses whose primary route of transmission involves airborne pathogens.
After being expelled from an infected person, such as by coughing or talking, respiratory pathogens can be transmitted to other people by direct contact with other people, or by particles becoming airborne and entering the body. may become infected. someone else's airway.
Although less common, pathogens that spread through the air can also spread from commonly contaminated surfaces, according to the report.
Public health scientists and stakeholders have debated for decades about what characteristics of a virus allow it to spread through the air, and it has been debated for decades, including the first SARS outbreak in 2002 and the Ebola outbreak in 2014. It has caused some confusion during other viral outbreaks.
However, the WHO report found that the debate over 'airborne' disease and 'aerosol transmission' during the early stages of the COVID-19 pandemic had given rise to 'misleading information about how pathogens are transmitted to human populations. This may have caused confusion.”
Despite the debate about wearing masks during the COVID-19 pandemic, the WHO report does not provide clear guidelines on under what circumstances masks should be worn. . mask It can prevent the spread of pathogens through the air.
However, the coalition agreed on “the importance of adequate ventilation and airflow patterns within indoor spaces” to reduce the risk of infection, but added that “prevention and mitigation measures may be tailored differently depending on the pathogen and situation.” “I need to do that,” he admitted.
Based on the previous definition of airborne disease, hospital systems have developed guidelines to ensure patient and worker safety, including isolation rooms and protective equipment such as N95 masks to avoid inhalation of tiny droplet particles. did. WHO's new guidance does not provide clear advice to hospitals on how to apply the new definition.
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