Understanding COVID-19: Transmission, Symptoms and Impact

Sochi Zung^*
*Correspondence: Sochi Zung, Department of Clinical Virology, Science and Technology of New York, New York, USA, Email:

Introduction

COVID-19 is a viral disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). It was first identified in December 2019 in Wuhan, China and has since become a global pandemic. Here's an explanation of the transmission, symptoms, and impact of COVID-19. COVID-19 primarily spreads through respiratory droplets when an infected person coughs, sneezes, talks, or breathes heavily. These droplets can be inhaled by nearby individuals or land on surfaces, where they can survive for varying periods depending on the material. The virus can then be transmitted when a person touches a contaminated surface and then touches their face, particularly the mouth, nose, or eyes. COVID-19 can also spread through close contact with an infected person, such as hugging or shaking hands.

Description

COVID-19 is a highly infectious disease caused by the SARS-CoV-2 virus, which was first identified in China and has since spread globally, resulting in a pandemic. The virus can be transmitted in two main ways: through direct contact with an infected individual, whether they are showing symptoms or not, and through indirect contact by touching contaminated surfaces. The virus can survive on surfaces for varying periods, ranging from a few hours to several days. It enters the human body through the nose, eyes, or mouth. Other potential sources of contamination include feces, blood, food, water, and semen. Additionally, environmental factors such as temperature and relative humidity can influence the transmission of the virus. As the disease continues to evolve, the number of cases is also increasing. However, proper planning and the implementation of restrictions have proven effective in influencing the trajectory of the transmission. Various measures have been undertaken to prevent infection, including practicing good personal hygiene, wearing face masks, isolating or quarantining individuals who are infected or have been in contact with infected individuals, and implementing social or physical distancing measures. In some cases, countries have resorted to lockdowns, which involve restricting movement except for essential services, particularly in areas experiencing a high number of cases or throughout the entire country.

Countries that have introduced and implemented various mitigation measures have experienced better control over the transmission of COVID-19. It's important to note that the situation surrounding COVID-19 is fluid, and guidance from health authorities may change as new information becomes available. It is crucial to stay informed and follow the recommendations of trusted sources such as the World Health Organization (WHO) or the Centres for Disease Control and Prevention (CDC) for the most up-to-date and accurate information. These participants were not included in these previous analyses. The majority of epidemiological longitudinal studies employ this design. Left truncation, on the other hand, reduces estimation precision and bias in this design. When there is a high proportion of TP users or when the distribution of TP users during the first wave of PATH participation differs from the distribution of participants who are followed longitudinally for the initiation of the TP, which is subject to rightcensoring, the bias is obvious [1-5].

Conclusion

The situation surrounding the disease is dynamic, and guidance from health authorities may change as new information emerges. Staying informed and following the recommendations of trusted sources such as the World Health Organization (WHO) or the Centers for Disease Control and Prevention (CDC) is crucial to ensure access to the most up-to-date and accurate information. By taking collective action, practicing good hygiene, following preventive measures, and adhering to public health guidelines, we can contribute to the global efforts to combat COVID-19 and mitigate its impact on individuals and communities. COVID-19 is a highly contagious viral disease caused by the SARS-CoV-2 virus. It primarily spreads through respiratory droplets and close contact with infected individuals. The symptoms of COVID-19 can range from mild to severe, and some individuals may not show any symptoms at all. Common symptoms include fever, cough, shortness of breath, fatigue, and loss of taste or smell.

References

1. Kaur, Satinder, Hemant Bherwani, Sunil Gulia and Ritesh Vijay, at al. "Understanding COVID-19 transmission, health impacts and mitigation: Timely social distancing is the key." Environ Dev Sustain 23 (2021): 6681-6697.

Google Scholar, Crossref, Indexed at

2. Ashcroft, Peter, Sonja Lehtinen, Daniel C. Angst and Nicola Low, et al. "Quantifying the impact of quarantine duration on COVID-19 transmission." Elife 10 (2021): e63704.

Google Scholar, Crossref, Indexed at

3. Aguilar, Jacob B., Jeremy Samuel Faust, Lauren M. Westafer and Juan B. Gutierrez. "Modeling the Impact of asymptomatic carriers on COVID-19 transmission dynamics during lockdown." MedRxiv (2020): 2020-03.

Google Scholar

4. Suh, Sang Heon, Seong Kwon Ma, Soo Wan Kim and Eun Hui Bae. "Angiotensin-converting enzyme 2 and kidney diseases in the era of coronavirus disease 2019." Korean J Intern Med 36 (2021): 247.

Google Scholar, Crossref, Indexed at

5. Herman-Edelstein, Michal, Tali Guetta, Amir Barnea and Maayan Waldman, et al. "Expression of the SARS-CoV-2 receptorACE2 in human heart is associated with uncontrolled diabetes, obesity, and activation of the renin angiotensin system." Cardiovasc Diabetol 20 (2021): 90.

Google Scholar, Crossref, Indexed at