Abstract:
BACKGROUND:This study examined the transmissibility between young children of an intranasally administered live attenuated human parainfluenza virus type 3 (HPIV3)-cp45 vaccine candidate. METHODS:Eighty subjects were enrolled in playgroups among whom there was at least one infected vaccinee in close contact with a seronegative placebo recipient over 21 days without a confounding infection with wtHPIV3. Following vaccination viral cultures were obtained on nine occasions to detect shedding and transmission of HPIV3cp45. Serum antibody titers were measured before and 7 weeks after vaccination. RESULTS:No child fulfilled the criteria for transmission of HPIV3cp45 giving a risk of transmission of 0.04 (95% CI 0.01-0.19), hence establishing that HPIV3cp45 is less infectious than wtHPIV3 and risk of transmission is not a limitation to further clinical development of this vaccine candidate.
journal_name
Vaccinejournal_title
Vaccineauthors
Madhi SA,Cutland C,Zhu Y,Hackell JG,Newman F,Blackburn N,Murphy BR,Belshe RB,Karron RA,Deatly AM,Gruber WC,Bernstein DI,Wright PFdoi
10.1016/j.vaccine.2005.12.002subject
Has Abstractpub_date
2006-03-20 00:00:00pages
2432-9issue
13eissn
0264-410Xissn
1873-2518pii
S0264-410X(05)01224-7journal_volume
24pub_type
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