Laboratorios de Diagnóstico y Aplicaciones (Diater), 28919 Madrid, Spain * Author to whom correspondence should be addressed. Vaccines2023,11(5), 979;https://doi.org/10.3390/vaccines11050979 Submission received: 9 March 2023/Revised: 2 May 2023/Accepted: 11 May 2023/Published: 13 May 2023 ...
an experimental study was performed at a public site such as a university classroom during a non-academic period in Madrid city. This includes two field campaigns, in summer (2021) and winter (2020), where instruments for measuring gases and particle air pollutants simultaneously measured outdoor...