Human astrovirus is a type of virus that primarily affects the gastrointestinal tract, leading to symptoms such as diarrhea, vomiting, and stomach pain. It is most common in young children, but can also infect adults, especially those with weakened immune systems. The virus spreads through contaminated food or water and can be transmitted from person to person. Infections caused by human astrovirus are usually mild and self-limiting, meaning they often resolve without medical treatment. However, in vulnerable populations, such as infants and the elderly, the virus can lead to more severe dehydration and complications. Good hygiene practices, like handwashing, can help prevent its spread.