
This study is part of ongoing surveillance of respiratory viruses within Kilifi County, coastal Kenya, and across the country that is aimed at understanding the epidemiology and disease burden of respiratory viruses in this region (Nokes et al. 2009). Two sets of samples were used in the current analysis: (1) samples collected from children (under 5 years of age) admitted to the Kilifi County Hospital (KCH) presenting with syndromically defined severe or very severe pneumonia between September 2011 and August 2016 (Nokes et al. 2009; Otieno et al. 2017) and (2) samples collected from patients of all ages presenting at health facilities within the Kilifi Health and Demographic Surveillance System (KHDSS) (Scott et al. 2012) with acute respiratory illnesses between January and December 2016 (Nyiro et al. 2018).