Fig. 1: BAM 1022 reference instrument.

a Investigators' site visit to Makerere University School of Public Health rooftop. b Ugandan Principal Investigator with the Air Quality Management District (AQMD) officer performing a quality assurance check.
a Investigators' site visit to Makerere University School of Public Health rooftop. b Ugandan Principal Investigator with the Air Quality Management District (AQMD) officer performing a quality assurance check.