Published on in Vol 4, No 3 (2021): Jul-Sep
![A Sociodemographic Profile of Mask Use During the COVID-19 Outbreak Among Young and Elderly Individuals in Brazil: Online Survey Study A Sociodemographic Profile of Mask Use During the COVID-19 Outbreak Among Young and Elderly Individuals in Brazil: Online Survey Study](https://asset.jmir.pub/assets/b6fc725eed75bde8bf3167817e42350d.png 480w,https://asset.jmir.pub/assets/b6fc725eed75bde8bf3167817e42350d.png 960w,https://asset.jmir.pub/assets/b6fc725eed75bde8bf3167817e42350d.png 1920w,https://asset.jmir.pub/assets/b6fc725eed75bde8bf3167817e42350d.png 2500w)
1 Universidade Federal do Espírito Santo, Espírito Santo, Brazil
2 Escola Paulista de Enfermagem, Universidade Federal de São Paulo, São Paulo, Brazil
3 Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, Brazil
4 Setor de Fisiologia Humana e do Exercício, Faculdade de Educação Física e Dança, Universidade Federal de Goiás, Goiânia, Brazil
5 Campus X, Teixeira de Freitas, Universidade do Estado da Bahia, Bahia, Brazil
6 School of Health and Caring Sciences, University of West Attica, Athens, Greece
7 Institute of Primary Care, University of Zurich, Zürich, Switzerland
8 Medbase St. Gallen Am Vadianplat, St. Gallen, Switzerland