Contagiousness of Varicella in Vaccinated Cases

Abstract
Varicella is a highly infectious disease caused by the varicella zoster virus, which is spread by droplet or airborne transmission. Before the varicella vaccination program in the United States, approximately 4 million varicella cases occurred each year, resulting in 10 600 hospitalizations and 100 deaths.1-3 The majority of cases occurred in children, which reflects its highly contagious nature.