In order to examine the acute effects of outdoor air pollution exposure on daily morbidity and mortality, Hub researchers from Addis Ababa University, Ethiopia; Makerere University, Uganda; and University of Nairobi, Kenya established partnerships with local hospitals in each country to collect relevant respiratory and cardiovascular related morbidity and mortality data and link it with the daily levels of PM2.5 reported by the central site outdoor air quality monitors in each capital city. Hub researchers created and continue to maintain electronic databases of daily morbidity and mortality data including  information on sex, age, residence, cause of admission, diagnosis of the diseases after admission, and cause of death. Air pollution and daily morbidity and mortality data collection began in each country between 2016 and 2019 as part of Cycle I of the Hub (2016-2022), and has been continuously in progress since initiation. Data collection will continue in each Hub country for the duration of Cycle II of the project (2022-2026).  Researchers will analyze these data to better understand the acute effects of outdoor air pollution exposure on the health of the public.