Before introduction of varicella vaccine in the United States in 1995, varicella was endemic, with virtually all persons being infected by adulthood. Since implementation of the varicella vaccination program, incidence has declined in all age groups, with the greatest decline among children aged 1-4 years. Data from passive and active surveillance have indicated a decline in varicella cases of 70%-84% from 1995 through 2001 (1-3). The downward trend in varicella has continued in the United States through 2005 with an approximately 90% decline in incidence from 1995 in active surveillance sites with high vaccine coverage (CDC, unpublished data).
Herpes zoster epidemiology and demographics
Vertigo epidemiology and demographics
Herpes simplex epidemiology and demographics
Lyme disease epidemiology and demographics
Chickenpox epidemiology and demographics
Smallpox epidemiology and demographics
Onychomycosis epidemiology and demographics
Impetigo epidemiology and demographics