Genetic characterization of 5 rubella viruses isolated from rubella patients in two outbreaks in Anhui Provinces of the People's Republic of China in 1999 was analyzed.The sequence analysis of the E1 coding gene of 5 isolates indicated that all of the viruses were members of genotype Ⅰ,that is a main genotype containing all of the isolates in the North America and Europe.This is the first evidence that rubella virus genotype Ⅰ also cir...