SARS-CoV-2 infection is caused by the novel coronavirus that emerged in Wuhan, China in late 2019. This highly infectious virus is responsible for the COVID-19 pandemic, which has had a devastating impact on public health, economies, and societies worldwide. Research on SARS-CoV-2 infection is focused on understanding the virus's transmission, pathogenesis, immune response, and development of diagnostics, treatments, and vaccines to control the spread of the virus and reduce its impact on human health. Studies are also investigating the long-term effects of COVID-19 on survivors and the potential for reinfection. Overall, the research on SARS-CoV-2 infection is critical for developing effective strategies to combat the pandemic and protect global public health.