* pregnant or breastfeeding women. * history of high-risk comorbidities, such as high-risk heart disease or respiratory diseases. * presence of heterogeneous facial anatomical characteristics such as bulky beard, facial deformities, or facial dimensions incompatible with the respirators.

* pregnant or breastfeeding women. * history of high-risk comorbidities, such as high-risk heart disease or respiratory diseases. * presence of heterogeneous facial anatomical characteristics such as bulky beard, facial deformities, or facial dimensions incompatible with the respirators.

pregnant or breastfeeding women. history of high-risk comorbidities, such as high-risk heart disease or respiratory diseases. presence of heterogeneous facial anatomical characteristics such as bulky beard, facial deformities, or facial dimensions incompatible with the respirators.

pregnant or breastfeeding women. history of high-risk comorbidities, such as high-risk heart disease or respiratory diseases. presence of heterogeneous facial anatomical characteristics such as bulky beard, facial deformities, or facial dimensions incompatible with the respirators.

- pregnant or breastfeeding women. - history of high-risk comorbidities, such as high-risk heart disease or respiratory diseases. - presence of heterogeneous facial anatomical characteristics such as bulky beard, facial deformities, or facial dimensions incompatible with the respirators. - smoker or frequent user of narcotic substances such as alcohol or illegal drugs. - user of any substance or assistance equipment that interferes with normal respiratory function.

- pregnant or breastfeeding women. - history of high-risk comorbidities, such as high-risk heart disease or respiratory diseases. - presence of heterogeneous facial anatomical characteristics such as bulky beard, facial deformities, or facial dimensions incompatible with the respirators. - smoker or frequent user of narcotic substances such as alcohol or illegal drugs. - user of any substance or assistance equipment that interferes with normal respiratory function.

- pregnant or breastfeeding women. - history of high-risk comorbidities, such as high-risk heart disease or respiratory diseases. - presence of heterogeneous facial anatomical characteristics such as: bulky beard, facial deformities or facial dimensions incompatible with the respirators. - smoker or frequent user of narcotic substances such as alcohol or illegal drugs. - user of any substance or assistance equipment that interferes with normal respiratory function. - professionals with history of covid-19 or positive result for igg+ or igg+ or rt-pcr+

- pregnant or breastfeeding women. - history of high-risk comorbidities, such as high-risk heart disease or respiratory diseases. - presence of heterogeneous facial anatomical characteristics such as: bulky beard, facial deformities or facial dimensions incompatible with the respirators. - smoker or frequent user of narcotic substances such as alcohol or illegal drugs. - user of any substance or assistance equipment that interferes with normal respiratory function. - professionals with history of covid-19 or positive result for igg+ or igg+ or rt-pcr+