Source avec lien : Annals of Work Exposures and Health, (En ligne). 10.1093/annweh/wxac031
Cette étude s’est appuyée sur l’utilisation temporaire par un sous-ensemble de travailleurs de la santé d’un appareil respiratoire de nouvelle marque présentant des défauts fréquents lorsqu’ils s’occupent de patients atteints de la maladie à coronavirus 2019 (COVID-19) pour évaluer l’effet protecteur des appareils respiratoires ordinaires contre l’infection par le SRAS-CoV-2.
There is strong observational evidence that respirators are highly effective in protecting the users from being infected with Middle East respiratory syndrome and severe acute respiratory syndrome coronavirus (SARS-CoV), but the evidence for SARS-CoV-2 during daily work is limited. This study utilized a subset of healthcare workers’ temporary use of a new brand respirator with frequent defects when caring for coronavirus disease 2019 (COVID-19) patients to assess the protective effect of regular respirators against SARS-CoV-2 infection.We retrospectively followed 463 participants wearing a regular respirator and 168 wearing the new brand respirator day-by-day when caring for COVID-19 patients until testing polymerase chain reaction positive for SARS-CoV-2 between 27th December 2020 and 14th January 2021.We observed seven and eight incident SARS-CoV-2-infected cases. This corresponded with daily infection rates of 0.2 and 0.5%, an incidence rate ratio of 0.4 [95% confidence interval (CI) 0.1; 1.0], and an incidence rate difference of 0.3% (95% CI −0.1; 0.8) when comparing a regular with the new brand respirator.We regard the new brand respirator a sham intervention, and this study thus provides further evidence for the protective effect of respirators when exposed to SARS-CoV-2 virus.