“COVID-19 LOWER CASE FATALITY RATE IN THE HIGH ALTITUDES CITIES OF BOLIVIA, COLOMBIA, ECUADOR, MEXICO, AND PERU: POSSIBLE PHYSIOLOGICAL AND ENVIRONMENTAL CAUSES”, ИЗВЕСТИЯ НАН, no. 6, pp. 132–133, Sep. 2022, Accessed: Aug. 19, 2026. Available: https://journal.uia.gov.kg/index.php/main/article/view/191