Which virus is known to cause encephalitis in both adults and children?

The West Nile virus is known to cause encephalitis in both adults and children. This virus is primarily transmitted through mosquito bites, and although many infected individuals may remain asymptomatic, a significant number can develop neurological complications, including encephalitis and meningitis. The clinical symptoms often include fever, headaches, confusion, and in severe cases, can lead to seizures or coma.

The ability of West Nile virus to cause serious neurological illness in a broad range of individuals, including children and adults, highlights its public health significance. Additionally, outbreaks are more common in certain geographical areas, and awareness of this virus is important for prevention and diagnosis.

In contrast, while the other viruses listed may cause various illnesses, they are not typically linked with encephalitis across both age groups. For instance, rubella primarily causes rash and congenital defects, parvovirus generally causes mild illness, and rotaviruses are most commonly associated with severe gastrointestinal symptoms, particularly in infants and young children.