The coronavirus, or COVID-19, is a highly contagious respiratory illness caused by the novel coronavirus SARS-CoV-2. It emerged in late 2019 and quickly spread worldwide, leading to a global pandemic. COVID-19 primarily spreads through respiratory droplets and can result in a wide range of symptoms, from mild to severe, with fever, cough, and shortness of breath being common indicators. The virus has had a profound impact on public health, economies, and daily life, prompting widespread efforts to curb its transmission through measures like social distancing, mask-wearing, and vaccination. Understanding the virus and its transmission dynamics has been crucial in managing and mitigating its effects, making it a subject of continuous scientific research and public health scrutiny.