Face masks effectively limit the probability of SARS-CoV-2 transmission.

ABSTRACT: Airborne transmission by droplets and aerosols is important for the spread of viruses. Face masks are a well-established preventive measure, but their effectiveness for mitigating SARS-CoV-2 transmission is still under debate. We show that variations in mask efficacy can be explained by different regimes of virus abundance and related to population-average infection probability and reproduction number. For SARS-CoV-2, the viral load of infectious individuals can vary by orders of magnitude. We find that most environments and contacts are under conditions of low virus abundance (virus-limited) where surgical masks are effective at preventing virus spread. More advanced masks and other protective equipment are required in potentially virus-rich indoor environments including medical centers a

SUBMITTER: Cheng Y 

PROVIDER: S-EPMC8168616 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature