Household air pollution and respiratory symptoms a month before and during the stringent COVID-19 lockdown levels 5 and 4 in South Africa. Clean Air Journal, [S. l.], v. 32, n. 1, 2022. DOI: 10.17159/caj/2022/32/1.13822. Disponível em: https://cleanairjournal.org.za/article/view/13822. Acesso em: 23 nov. 2024.