What type of infection does norovirus cause?

Norovirus is primarily known for causing gastroenteritis, which is an inflammation of the stomach and intestines leading to symptoms such as vomiting, diarrhea, stomach pain, and nausea. It is highly contagious and often spreads through contaminated food or water, surfaces, and close contact with infected individuals. Gastroenteritis caused by norovirus can occur in outbreaks, especially in crowded environments like schools, nursing homes, and cruise ships. This is why the choice indicating gastroenteritis is the correct answer; it directly relates to the characteristic effects and transmission methods of norovirus. Other types of infections listed do not accurately describe the impact or nature of norovirus, as it does not cause respiratory, skin, or blood infections.