Immunological and Hematological Response in COVID-19

Area of Science:

• Infectious Diseases
• Immunology
• Hematology

Background:

• Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a global pandemic.
• The virus may impact lung circulation via the renin-angiotensin system, potentially causing systemic damage.
• Understanding the immunological and hematological implications of SARS-CoV-2 is crucial.

Purpose of the Study:

• To review current evidence on the inflammatory and hematological changes associated with SARS-CoV-2 infection.
• To elucidate the role of these changes in disease pathophysiology and severity.

Main Methods:

• A comprehensive review of electronic databases was conducted.
• Searches included keywords such as "SARS-CoV-2," "COVID-19," "inflammation," "immunological," and "therapy."
• Data was screened by two independent investigators.

Main Results:

• SARS-CoV-2 infection can trigger an excessive immune response, leading to a "cytokine storm" and hyperinflammation.
• This excessive inflammation results in tissue and vascular damage, with increased reactive oxygen species.
• Key hematological alterations associated with severe COVID-19 include lymphocytopenia, thrombocytopenia, and elevated D-dimer levels.

Conclusions:

• SARS-CoV-2 infection induces a complex interplay of inflammatory, hematological, and coagulation alterations.
• Measuring these specific hematological changes can aid in identifying high-risk patients.
• Monitoring these parameters is valuable for assessing disease severity and progression.