Vusala Abbasova / June 14, 2022
Russian health authorities have confirmed that a more contagious subvariant of the Covid-19 Omicron strain, called BA...
Vusala Abbasova / August 18, 2021
The rapid spread of the Delta, a highly contagious SARS-CoV-2 virus strain, has put the world in need of creating a s...