According to researchers, the one-dose vaccine program, run by the CDC and state and local governments, prevented about 50,000 hospitalizations in the United States from 2000 to 2006.
"Our study shows that the vaccination program has been successful in reducing varicella-infection hospitalizations not only among the targeted population of 10 years and under, but also has resulted in a 65 percent decline in persons greater than 20 years of age during the one-dose era," said study co-author Adriana Lopez, an epidemiologist in the division of viral diseases in the CDC's National Center for Immunizations and Respiratory Diseases.
During the one-dose era, the annual hospitalization rate for chickenpox decreased 70 percent for children under 20 years old and 65 percent for those aged 20 and older, according to the report in the February issue of Pediatrics.