• Shaista Ajaz
• Nitasha Sawhney

ABSTRACT: The 2019 novel coronavirus (2019-nCoV), commonly known as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) or coronavirus disease 2019 (COVID-19), was first revealed in late 2019 in Wuhan city, Hubei province, China. It was subsequently spread globally and thereby declared as a pandemic by WHO in March 2020. The disease causes severe acute respiratory illness and is highly contagious due to the fast-onward transmission. As of the mid of November 2020, the disease has affected 220 countries with more than 16 million active cases and 1.3 million deaths worldwide. Males, pregnant women, the elderly, immunosuppressed patients, and those with underlying medical conditions are more vulnerable to the disease than the general healthy population. Unfortunately, no definite treatment is available. The aim of this review was to understand the mechanism of entry of virus inside human body and its effects on various organs

: covid-19, life cycle, immune system

"Understanding COVID-19: A COMPREHENSSIVE REVIEW ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 4, page no.f182-f186, April-2022, Available :http://www.jetir.org/papers/JETIR2204525.pdf

"Understanding COVID-19: A COMPREHENSSIVE REVIEW ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 4, page no. ppf182-f186, April-2022, Available at : http://www.jetir.org/papers/JETIR2204525.pdf