Norovirus is a highly contagious virus that causes gastroenteritis, resulting in symptoms such as vomiting, diarrhea, and stomach cramps. It is a common cause of foodborne illness and outbreaks of illness in settings such as cruise ships, schools, and nursing homes. Researchers study norovirus to better understand how it spreads, how to prevent outbreaks, and develop vaccines and treatments. Studies often focus on the virus's genetic makeup, transmission patterns, and how it evades the immune system. Overall, research on norovirus is important for public health efforts to control and minimize the impact of this widespread and disruptive virus.