Author A. Zanetti
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An economic evaluation of varicella vaccination in Italian adolescents / Nancy Thiry in Vaccine, 22(2004)27-28 ([09/09/2004])
[article] An economic evaluation of varicella vaccination in Italian adolescents [printed text] / Nancy Thiry, Author ; Philippe Beutels, Author ; Francesco Tancredi, Author ; A. Zanetti, Author ; Paolo Bonanni, Author ; Giovanni Gabutti, Author ; Pierre Van Damme, Author . - 2004 . - 3546-3562.
Languages : English (eng)
in Vaccine > 22(2004)27-28 [09/09/2004] . - 3546-3562
W 1 Serials. Periodicals
Adolescent ; Adult ; Age Factors ; Aged ; Chickenpox Vaccine ; Child ; Child, Preschool ; Cost of Illness ; Cost-Benefit Analysis ; Economics ; Encephalitis, Varicella Zoster ; Epidemiology ; Female ; Hospitalization ; Humans ; Italy ; Journal Article ; Male ; Markov Chains ; Mass Immunization ; Middle Aged ; Netherlands ; Peer Review ; prevention and control ; statistics and numerical data [Subheading]
Abstract: An economic evaluation was performed to assess five varicella vaccination scenarios targeted to 11-year-old Italian adolescents. The scenarios were: "compulsory vaccination" of all adolescents, recommended vaccination of susceptible adolescents on the basis of an "anamnestic screening", a "blood test" or a combination of both ("both tests") and vaccination of adolescents in the private sector, at the parents' charge ("private vaccination"). Probabilities and unit costs were taken from published sources and experts opinion. The accuracy of the anamnestic screening (81.6% sensitivity and 87.3% specificity) was derived from a separate descriptive study among 344 Italian adolescents. The costs and benefits of each scenario were simulated using a Markov model and cost-effectiveness, budget-impact and cost-benefit analyses were conducted. Of all considered scenarios, "both tests" and "anamnestic screening" were the most appealing options with an estimated net direct cost of 5058 and 8929 per life-year gained (compared to no vaccination) versus 14,693-42,842 for the other scenarios. These two scenarios further resulted in substantial net savings for society (over 600,000 per cohort, BCR: 2.17). The need for a serological confirmation was highly dependent on the sensitivity of the anamnestic screening, which is believed to increase once such a program is launched. For practical considerations, "anamnestic screening" seems to be the most convenient option. Link for e-copy: http://tiny.cc/xktyn Format of e-copy: VDIC IP recognition Record link: [article]Seroprevalence de l'immunite au virus de la varicelle et du zona chez le personnel de creche et de halte-garderie a Lyon (France) / F. Reignier in Médecine et maladies infectieuses, 35(2005)4 ([04/01/2005])
[article] Seroprevalence de l'immunite au virus de la varicelle et du zona chez le personnel de creche et de halte-garderie a Lyon (France) = Varicella-zoster virus seroprevalence in nursery and day-care workers in Lyon (France) [printed text] / F. Reignier, Author ; L. Romano, Author ; Nancy Thiry ; Philippe Beutels ; Pierre Van Damme ; C. Fau ; C. Gaspard ; V. Mamoux ; A. Zanetti ; D. Floret . - 2005 . - 192-196.
Languages : English (eng) French (fre)
in Médecine et maladies infectieuses > 35(2005)4 [04/01/2005] . - 192-196
W 1 Serials. Periodicals
Adult ; Chickenpox ; Child ; Child Day Care Centers ; Enzyme-Linked Immunosorbent Assay ; Epidemiology ; Female ; France ; Herpesvirus 3, Human ; Humans ; Journal Article ; Male ; manpower ; Middle Aged ; Peer Review ; Predictive Value of Tests ; Seroepidemiologic Studies
Abstract: OBJECTIVE: Varicella is a potential occupational hazard for susceptible individuals working in pediatric institutions because infected adults run a greater risk of severe or even fatal varicella and because the disease is so common in children and so contagious. The seroprevalence of varicella-zoster virus (VZV) was examined in a sample of day-care workers in Lyon (France) to determine whether a targeted vaccination policy was needed. METHODS: Two hundred forty-one sera were sampled and analysed with an Elisa test between March and May 2001. Histories of past VZV infection were collected via questionnaires documented either before or after consultation of medical records or other sources of information. RESULTS: The overall VZV seroprevalence was 99.6%. The positive predictive values of past varicella histories (documented or not) were>99% showing that a history of previous varicella in day-care workers was reliable. However, only 68 to 71% of these with serologically confirmed varicella reported a prior history of varicella. All subjects reporting a non-positive history of varicella were seropositive. CONCLUSIONS: Virtually all day-care workers enrolled in this study presented serological evidence of VZV so that sub-populations at risk for varicella infection for which VZV vaccination may be effective could not be identified. However, the VZV seroprevalence of the workers in pediatric institutions being presumably higher than that of the general adult population (94-96.3%), vaccination of susceptible young recruits before any exposure to the VZV, or even vaccination of students willing to work in a pediatric institution, may be positive. Link for e-copy: http://tiny.cc/3akkm Format of e-copy: VDIC IP recognition Record link: [article]