Human astrovirus strain Type 1 is propagated in Caco-2 [Caco2] cells (ATCC HTB-37). This strain was isolated from a human stool sample in Oxford, United Kingdom, and was deposited by the Centers for Disease Control and Prevention, Division of Viral Diseases. It can be used in a variety of applications, including virucide testing, antiviral studies, spiking studies, enteric disease research, assay development, and vaccine development.