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SARS-CoV-2: Current trends in emerging variants, pathogenesis, immune responses, potential therapeutic, and vaccine
Ali Salimi-Jeda1, Sina Abbassi2, Atieh Mousavizadeh3
1Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
Abstract:
More than a year after the SARS-CoV-2 pandemic, the Coronavirus disease 19 (COVID-19) is still a major global challenge for scientists to understand the different dimensions of infection and find ways to prevent, treat, and develop a vaccine. On January 30, 2020, the world health organization (WHO) officially announced this new virus as an international health emergency. While many biological and mechanisms of pathogenicity of this virus are still unclear, it seems that cytokine storm resulting from an immune response against the virus is considered the main culprit of the severity of the disease. Despite many global efforts to control the SARS-CoV-2, several problems and challenges have been posed in controlling the COVID-19 infection. These problems include the various mutations, the emergence of variants with high transmissibility, the short period of immunity against the virus, the possibility of reinfection in people improved, lack of specific drugs, and problems in the development of highly sensitive and specific vaccines. In this review, we summarized the results of the current trend and the latest research studies on the characteristics of the structure and genome of the SARS-CoV- 2, new mutations and variants of SARS-CoV-2, pathogenicity, immune response, virus diagnostic tests, potential treatment, and vaccine candidate.
Insights
The COVID-19 pandemic, caused by SARS-CoV-2, presents ongoing challenges due to mutations, immune evasion, and treatment difficulties. This review covers the latest research on virus characteristics, pathogenicity, immune response, diagnostics, treatments, and vaccine candidates.
Area of Science:
- Virology
- Immunology
- Infectious Diseases
Background:
- The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic continues to pose significant global health challenges.
- Understanding the virus's pathogenicity, immune response, and evolving variants is crucial for effective control.
- Cytokine storm is implicated as a major factor in COVID-19 disease severity.
Purpose of the Study:
- To review the current trends and latest research on SARS-CoV-2.
- To summarize key findings on viral structure, genome, mutations, and variants.
- To provide an overview of pathogenicity, immune response, diagnostics, treatments, and vaccine development.
Main Methods:
- Literature review of recent scientific studies on SARS-CoV-2.
- Synthesis of information on viral characteristics, genetic mutations, and emerging variants.
- Compilation of data on immune responses, diagnostic methods, therapeutic strategies, and vaccine candidates.
Main Results:
- SARS-CoV-2 exhibits significant genetic variability, leading to the emergence of highly transmissible variants.
- The immune response, including cytokine storm, plays a critical role in disease severity.
- Challenges persist in achieving long-lasting immunity, preventing reinfection, and developing effective vaccines and treatments.
Conclusions:
- Continued research is essential to address the complexities of SARS-CoV-2 infection, including its mutations and immune interactions.
- Effective control strategies require advancements in diagnostics, therapeutics, and vaccine development.
- The review highlights the need for a comprehensive understanding to combat the ongoing COVID-19 pandemic.
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