Gudelienė-Gudelevičienė, Loreta, and Michailas Aizenas. “COVID-19: Epidemiology, Virology and Prevention”. Slauga. Mokslas Ir Praktika, vol. 2, no. 1 (289), Jan. 2021, pp. 21-28, https://www.journals.vu.lt/slauga/article/view/22417.