Description

CPOXEV indicates whether sample children and, beginning in 2000, whether sample adults ever had chickenpox. The survey question, "Has [name] ever had chickenpox?" did not require that the condition be diagnosed by a doctor or other health professional. Caused by the herpes zoster virus, chickenpox is a mild childhood illness but may have more serious complications in adults.

Routine immunization against chickenpox, using the varicella vaccine, started in the United States in 1995. The CDC recommends this vaccination, ideally administered between 12 and 18 months of age, for healthy children. Proof of vaccination is required by many states before a child can enter child care or school. The CDC also recommends vaccination for adults who have never had chickenpox, particularly those who live or work in environments where chickenpox transmission is likely (such as day-care facilities and institutional settings).

Respondents who indicated they ever had chickenpox were asked whether they had chickenpox during the past 12 months. This variable, CPOXYR, is available for sample children beginning in 1999 and for sample adults beginning in 2000.

Comparability

Apart from the change in universe, this variable is completely comparable over time.

Universe

Availability

• 1997-2018

Weights

• 1997-2018 : SAMPWEIGHT