Is covid a virus

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Is COVID-19 a Virus?

COVID-19 Virus Identification

COVID-19, also known as Coronavirus Disease 2019, is indeed caused by a virus. The virus responsible for this disease is named Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) 146. SARS-CoV-2 is a novel strain from the Coronaviridae family, which includes other well-known viruses such as those causing Severe Acute Respiratory Syndrome (SARS) and Middle East Respiratory Syndrome (MERS) 59.

Virological Characteristics of SARS-CoV-2

SARS-CoV-2 is an enveloped, positive-sense, single-stranded RNA virus. It shares high sequence identity with bat- and pangolin-derived SARS-like coronaviruses, suggesting a zoonotic origin . The virus primarily targets the respiratory tract, with active replication confirmed in the tissues of the upper respiratory tract . The spike glycoprotein on its surface is a major inducer of neutralizing antibodies and is a key target for vaccine development 35.

Pathogenesis and Immune Response

The pathogenesis of SARS-CoV-2 involves the virus evading early immune responses and causing a hyper-inflammatory state in critically ill patients. This hyper-inflammatory response, often referred to as a "cytokine storm," can lead to acute respiratory distress syndrome (ARDS) and multi-organ failure 110. The virus's ability to bind to the angiotensin-converting enzyme 2 (ACE2) receptor facilitates its entry into host cells, which is a critical step in its pathogenicity .

Transmission and Containment

SARS-CoV-2 is highly contagious, primarily spreading through respiratory droplets when an infected person coughs or sneezes. It can also spread via fomites on surfaces . The virus's high transmissibility is evident from the rapid global spread and the ongoing pandemic status 67. Effective containment measures include maintaining hand hygiene, social distancing, and the use of personal protective equipment such as masks .

Conclusion

In summary, COVID-19 is caused by the SARS-CoV-2 virus, a novel coronavirus with significant pathogenic and transmissible characteristics. Understanding its virology, pathogenesis, and transmission mechanisms is crucial for developing effective therapeutic and preventive strategies. The global scientific community continues to work on vaccines and treatments to combat this highly contagious virus.

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Most relevant research papers on this topic

The immune system and COVID-19: Friend or foe?

Abstract Aim Coronavirus disease 2019 (COVID-19) is a novel highly contagious infection caused by SARS-CoV-2, which has been became a global public health challenge. The pathogenesis of this virus is not yet clearly understood, but there is evidence of a hyper-inflammatory immune response in critically ill patients, which leads to acute respiratory distress syndrome (ARDS) and multi-organ failure. Material and methods A literature review was performed to identify relevant articles on COVID-19 published up to April 30, 2020. The search resulted in 361 total articles. After reviewing the titles and abstracts for inclusion, some irrelevant papers were excluded. Additional relevant articles were identified from a review of citations referenced. Key findings SARS-CoV-2, directly and indirectly, affects the immune system and avoids being eliminated in early stages. On the other hand, the secretion of inflammatory cytokines creates critical conditions that lead to multi-organ failure. Significance The immune system which is affected by the virus tries to respond via a cytokine storm and hyperinflammation, which itself leads to further multi-organ damage and even death.

Systematic ReviewHighly Cited

2020·

226citations

·F. Yazdanpanah et al.

Life Sciences·

DOI

Virological assessment of hospitalized patients with COVID-2019

COVID-19 can present as a mild upper respiratory tract illness, with active virus replication in tissues of the upper respiratory tract, highlighting the need for targeted containment strategies.

Case ReportRigorous JournalHighly Cited

2020·

6476citations

·R. Wölfel et al.

Nature·

DOI

COVID-19, an emerging coronavirus infection: advances and prospects in designing and developing vaccines, immunotherapeutics, and therapeutics

Advances in designing COVID-19 vaccines and therapeutics show promise, but no licensed treatment or vaccine currently exists.

Highly Cited

2020·

554citations

·K. Dhama et al.

Human Vaccines & Immunotherapeutics·

DOI

Understanding of COVID‐19 based on current evidence

Since December 2019, a series of unexplained pneumonia cases have been reported in Wuhan, China. On 12 January 2020, the World Health Organization (WHO) temporarily named this new virus as the 2019 novel coronavirus (2019‐nCoV). On 11 February 2020, the WHO officially named the disease caused by the 2019‐nCoV as coronavirus disease (COVID‐19). The COVID‐19 epidemic is spreading all over the world, especially in China. Based on the published evidence, we systematically discuss the characteristics of COVID‐19 in the hope of providing a reference for future studies and help for the prevention and control of the COVID‐19 epidemic.

Highly Cited

2020·

978citations

·P. Sun et al.

Journal of Medical Virology·

DOI

COVID-19: breaking down a global health crisis

COVID-19 has caused over two million deaths globally, with hand-washing, social distancing, and personal protective equipment being key to preventing infection and managing patients.

Literature ReviewHighly Cited

2021·

293citations

·Saad I. Mallah et al.

Annals of Clinical Microbiology and Antimicrobials·

DOI

COVID-19: The first documented coronavirus pandemic in history

COVID-19 is a highly contagious, rapidly evolving human coronavirus that has become the first documented pandemic in history.

Rigorous JournalHighly Cited

2020·

768citations

·Yen-Chin Liu et al.

Biomedical Journal·

DOI

Coronavirus Disease 2019–COVID-19

COVID-19 shows less severe pathogenesis but higher transmission competence, suggesting a novel coronavirus strain, SARS-CoV-2, may originate from animals and spread human-to-human.

Highly Cited

2020·

584citations

·K. Dhama et al.

Clinical Microbiology Reviews·

DOI

COVID‐2019: The role of the nsp2 and nsp3 in its pathogenesis

COVID-2019 has undergone positive selective pressure, potentially explaining its high contagiousness and differentiating it from SARS-like viruses.

Highly Cited

2020·

354citations

·S. Angeletti et al.

Journal of Medical Virology·

DOI

COVID-19: discovery, diagnostics and drug development

SARS-CoV-2 was identified and sequenced in China, and drug discovery efforts are ongoing to develop more potent and specific treatments for COVID-19.

Rigorous JournalHighly Cited

2020·

362citations

·T. Asselah et al.

Journal of hepatology·

DOI

COVID-19 and cardiovascular disease: from basic mechanisms to clinical perspectives

COVID-19 can cause cardiovascular disorders, including myocardial injury, arrhythmias, acute coronary syndrome, and venous thromboembolism, and pre-existing cardiovascular disease increases the risk of death.

Highly Cited

2020·

1198citations

·M. Nishiga et al.

Nature Reviews. Cardiology·

DOI

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