Urrutia-Pereira, M., C.A. Mello-da-Silva, and D. Solé. “COVID-19 and Air Pollution: A Dangerous Association?”. Allergologia et Immunopathologia 48, no. 5 (September 15, 2020): 496–499. Accessed October 1, 2025. https://www.all-imm.com/index.php/aei/article/view/161.