Journal
PATHOGENS
Volume 9, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/pathogens9121027
Keywords
COVID-19; SARS-CoV-2; adaptive immunity; B and T cell immune response
Categories
Funding
- Canadian Institutes for Health Research project [406738]
- Ontario Ministry of Research and Innovation Early Researcher Award
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The current coronavirus disease 2019 (COVID-19) pandemic, a disease caused by severe acute respiratory syndrome corona virus 2 (SARS-CoV-2), was first identified in December 2019 in China, and has led to thousands of mortalities globally each day. While the innate immune response serves as the first line of defense, viral clearance requires activation of adaptive immunity, which employs B and T cells to provide sanitizing immunity. SARS-CoV-2 has a potent arsenal of mechanisms used to counter this adaptive immune response through processes, such as T cells depletion and T cell exhaustion. These phenomena are most often observed in severe SARS-CoV-2 patients, pointing towards a link between T cell function and disease severity. Moreover, neutralizing antibody titers and memory B cell responses may be short lived in many SARS-CoV-2 patients, potentially exposing these patients to re-infection. In this review, we discuss our current understanding of B and T cells immune responses and activity in SARS-CoV-2 pathogenesis.
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