Infectious Disease

The transmission of respiratory ailments outdoor is “undoubtedly”, however much less so than indoors

December 08, 2020

1 min read

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Disclosure:
Razani reports that he has received grants from the REI Foundation and the Long Foundation. In the study you will find all relevant financial information from all other authors.

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Transmission of SARS-CoV-2 and other respiratory viruses outdoors is possible, but the chances are much lower than if they were transmitted indoors, according to a recent study.

“We wanted to better understand the risk of receiving or transmitting SARS-CoV-2 when people gather outdoors.” Nooshin Razani, MD, MPH, The director of the Center for Nature and Health at the University of California, San Francisco Benioff Children’s Hospital Oakland told Healio. “We wanted to provide guidelines that balance the many health benefits of being outdoors with the very important need to reduce COVID transmission.

Outdoor and indoor broadcast for COVID19

Source: Bulfone TC et al. J Infect Dis. 2020; doi: 10.1093 / infdis / jiaa742.

By August 12, 2020, Razani and colleagues carried out a systematic review of the peer review articles indexed in PubMed, EMBASE and Web of Science as well as the preprints in Europe PMC, in which cases of transmission of SARS-CoV from person to person were described were. 2. Researchers included reports of other respiratory virus transmissions for reference.

Five studies in their analysis found that less than 10% of SARS-CoV-2 infections reported worldwide occurred outdoors and that the likelihood of transmission indoors was 18.7 times higher than transmission outdoors (95% CI, 6-57.9).

Nooshin Razani

In addition, the researchers found five studies describing influenza transmission outdoors and two describing adenovirus transmission outdoors. However, varying quality of studies and definitions of “outdoor transmission” limited their ability to draw conclusions. However, they found that factors such as the length and frequency of face-to-face contact, lack of personal protective equipment, and occasional indoor gathering during a largely outdoor experience were linked to reports of infections outdoors.

According to Razani, “the transmission definitely happens outdoors”.

“Bottom line: The evidence available supports the popular belief that the risk of SARS-CoV-2 transmission is lower outdoors, but there are significant gaps in our understanding of specific pathways. Access to outside areas is important as there is less chance of infection, ”Razani said. “But being outside doesn’t make you immune to infection or stop you from spreading infections. You still need masks and distance outdoors. “

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