Conventional T cells are phenotypically and functionally diverse and have a critical role in long-lasting protection conferred by immune memory. CD8+ cytotoxic T lymphocytes (CTL) in the respiratory tract blunt virus replication by directly killing infected cells and secrete...
The Delta variant causes more infections and spreads faster than early forms of SARS-CoV-2, the virus that causes COVID-19 The Delta variant is more contagious. The Delta variant is highly contagious, more than 2x as contagious as previous variants. Some data suggest the Delta...
On November 24, 2021, South Africa reported the identification of a new SARS-CoV-2 variant, B.1.1.529, to the World Health Organization (WHO). B.1.1.529 was first detected in specimens collected on November 11, 2021, in Botswana and on November 14, 2021, in South Africa. On...