Research on COVID-19 patients focuses on understanding the disease's effects on individuals infected with the virus. This includes studying the transmission and spread of the virus, identifying risk factors for severe illness, investigating the immune response to the virus, and developing effective treatments and vaccines. Researchers also examine the long-term health outcomes of COVID-19 patients to better understand the potential lasting effects of the disease. Additionally, studies on COVID-19 patients aim to improve clinical management and care practices for those affected by the virus.