## 5 Conclusions  
The results of this study demonstrated a positive perception among professionals from different hospitals and healthcare units who used the decontamination chamber for the instantaneous decontamination of PPE before the deffing process. Based on the results that were obtained regarding the perception of efficacy and safety, the technology can be an effective option to control the load of microorganisms in controlled environments. This equipment can be used in reference hospitals that are designated for the treatment of patients with COVID-19, mainly to avoid self-contamination of the healthcare workers during the deffing of PPE. The PPE deffing process is considered critical due to the high transmission capacity of SARS-CoV-2. It is also important to install disinfection chambers in areas near the ICUs and wards to be used by professionals who have donned PPE, so as to avoid any type of direct contact with the biocidal agent. Additionally, it can be used by professionals after contact with patients or at the end of their work shift. The results found in this study demonstrate the safety and usefulness of disinfection technologies in environments where the microbial load must be controlled, especially during the COVID-19 pandemic.  
The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/app12157771/s1](https://www.mdpi.com/article/10.3390/app12157771/s1)]([https://www.mdpi.com/article/10.3390/app12157771/s1](https://www.mdpi.com/article/10.3390/app12157771/s1)), Table S1: Questionnaire of the experimental use of the disinfection chamber; Table S2: Absolute and relative frequency of responses to survey questions evaluated in this study according to the hospital or healthcare unit (values in percentages (%) are presented in brackets).  
Conceptualization, L.A.B.M., B.A.S.M., A.A.B.S., L.P.C.d.S.A. and R.B.; Data curation, L.A.B.M., B.A.S.M., L.d.A.P.R., A.A.B.S. and L.P.C.d.S.A.; Formal analysis, L.A.B.M., B.A.S.M., L.d.A.P.R., L.P.C.d.S.A. and R.B.; Investigation, L.A.B.M., B.A.S.M., L.d.A.P.R., A.A.B.S., L.P.C.d.S.A. and R.B.; Methodology, L.A.B.M., B.A.S.M., L.d.A.P.R., K.V.S.H., A.A.B.S. and L.P.C.d.S.A.; Project administration, L.A.B.M., B.A.S.M., L.P.C.d.S.A. and R.B.; Software, L.A.B.M., B.A.S.M., K.V.S.H. and A.A.B.S.; Supervision, L.A.B.M., B.A.S.M., A.A.B.S., L.P.C.d.S.A. and R.B.; Validation, L.A.B.M., B.A.S.M., L.d.A.P.R., A.A.B.S., L.P.C.d.S.A. and R.B.; L.P.C.d.S.A.; Writing--original draft, L.A.B.M., B.A.S.M., K.V.S.H., A.A.B.S., L.P.C.d.S.A. and R.B.; Writing--review and editing, L.A.B.M., B.A.S.M. and R.B. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This research received no external funding.  
**Institutional Review Board Statement:** The study was conducted in accordance with the Declaration of Helsinki and approved by the Institutional Review Board (or Ethics Committee) of SENAI CIMATEC University Center (No. 4132735 and date of approval was 3 July 2020).  
**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.  
**Data Availability Statement:** The data presented in this study are available on request from the corresponding author.  
**Acknowledgments:** The authors would like to thank the staff of all the hospitals and healthcare units who participated in the study, all the professionals who kindly and voluntarily agreed to participate in the survey, the teams from the SENAI units located in the interior of the state of Bahia who provided support in the application of the questionnaires, and SERIAL. The authors are also grateful to CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico) (BASM is a Technological fellow from CNPq 306041/2021-9).  
**Conflicts of Interest:** The authors declare no conflict of interest.