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. 2021 Jun 7;5(3):e155. doi: 10.1097/EE9.0000000000000155

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Copyright © 2021 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of The Environmental Epidemiology. All rights reserved.

Written work prepared by employees of the Federal Government as part of their official duties is, under the U.S. Copyright Act, a "work of the United States Government" for which copyright protection under Title 17 of the United States Code is not available. As such, copyright does not extend to the contributions of employees of the Federal Government.

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Figure 5. — Daily pattern of 24-hour average PM_2.5 concentrations in Addis Ababa, Ethiopia, 2017–2020.