Severe acute respiratory syndrome coronavirus 2 is a
Betacoronavirus of 2B group that belongs to the family of
Coronaviridae. Delta variant, which emerged in the Indian
State of Maharashtra in December 2020, is nowadays the
variant of the most widespread concern and it consists on 3
subtypes, B.1.617.1, B.1.617.2, and B.1.617.3. The
transmission rate of Delta variant is 50% - 60% higherthan the
Alpha variant and this variant is what currently concerns the
world population. In this paper, we present the case of the first
registered patient with Delta variant of COVID-19 in Serbia.