Most ten-year-old children with negative or unknown histories of chickenpox are immune.
To evaluate the proportion of children to vaccinate against varicella in a catch-up program targeting 9- to 10-year-old children, a study was conducted among children age 10 years to assess the age-specific incidence of varicella and document the immunity against varicella in those with negative or unknown chickenpox history. Of the latter 62% were seropositive for varicella.
Boulianne
N
N
Institut National de Santé Publique du Québec, Quebec, Canada. nicole.boulianne@ssss.gouv.qc.ca
Duval
B
B
De Serres
G
G
Deceuninck
G
G
Massé
R
R
Couillard
M
M
D000367:Age Factors; D000914:Antibodies, Viral / Q000097:blood*; D002644:Chickenpox / Q000097:blood / Q000453:epidemiology / Q000276:immunology*; D002648:Child; D015331:Cohort Studies; D005260:Female; D014645:Herpesvirus 3, Human / Q000276:immunology*; D006801:Humans; D015994:Incidence; D008297:Male; D015995:Prevalence; D011792:Quebec / Q000453:epidemiology; D016036:Seroepidemiologic Studies
D000914:Antibodies, Viral