Research on COVID-19 transmission focuses on understanding how the virus spreads from person to person and the factors that contribute to its transmission. This includes studying how the virus is transmitted through respiratory droplets, aerosols, and contact with contaminated surfaces. Researchers also investigate the effectiveness of public health measures such as wearing masks, social distancing, and hand hygiene in preventing transmission. Additionally, studies may explore the role of asymptomatic and pre-symptomatic individuals in spreading the virus, as well as the impact of environmental factors on transmission rates. Understanding the mechanisms of COVID-19 transmission is crucial for developing strategies to control the spread of the virus and protect public health.